Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Remove "es6-symbol" package from DevTools #18397

Merged
merged 1 commit into from Mar 26, 2020

Conversation

bvaughn
Copy link
Contributor

@bvaughn bvaughn commented Mar 26, 2020

This polyfill was copied over from DevTools v3 but given the current browser compatibility for Symbol, I think it's safe to remove.

This will also reduce the size on disk for react-devtools-inline- since es6-symbol depends on es5-ext which is kind of large. (react-devtools-extensions still depends on es6-symbol indirectly, because of web-ext, but this at least react-devtools-inline doens't.)

@bvaughn bvaughn requested review from cpojer and gaearon March 26, 2020 16:19
@facebook-github-bot facebook-github-bot added CLA Signed React Core Team Opened by a member of the React Core Team labels Mar 26, 2020
@@ -124,7 +124,7 @@ function HookView({canEditHooks, hook, id, inspectPath, path}: HookViewProps) {
hook !== null &&
typeof hook === 'object' &&
hook.hasOwnProperty(meta.type)
? hook[meta.type]
? hook[(meta.type: any)]
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Why was this change needed?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Flow complains otherwise:

Cannot access computed property using Symbol

@sizebot
Copy link

sizebot commented Mar 26, 2020

No significant bundle size changes to report.

Size changes (stable)

Generated by 🚫 dangerJS against c8bd782

@sizebot
Copy link

sizebot commented Mar 26, 2020

No significant bundle size changes to report.

Size changes (experimental)

Generated by 🚫 dangerJS against c8bd782

Copy link
Contributor

@cpojer cpojer left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Thanks so much for cleaning this up! Do you mind deploying a new version of the devtools into xplat/js after merging this?

@bvaughn bvaughn merged commit d92631e into facebook:master Mar 26, 2020
@bvaughn bvaughn deleted the devtools-remove-symbol-polyfill branch March 26, 2020 16:31
@bvaughn
Copy link
Contributor Author

bvaughn commented Mar 26, 2020

Thanks so much for cleaning this up! Do you mind deploying a new version of the devtools into xplat/js after merging this?

Landing things in xplat can be a hassle, and this isn't top priority for me at the moment. I'll take a shot at it, assuming it doesn't take too long. :)

facebook-github-bot pushed a commit to facebook/flipper that referenced this pull request Mar 26, 2020
Summary:
Upgrading the embedded version of React DevTools, primarily to pull in [this PR](facebook/react#18397) which will reduce the impact of this package on `node_modules` size.

# Update process

Following a similar process as D15973709, I began by searching for [all of the references](https://our.intern.facebook.com/intern/biggrep/?corpus=xplat&filename=.json&case=false&view=default&extre=&s=%22react-devtools&engine=apr_strmatch&context=false&filter[uninteresting]=false&filter[intern]=false&filter[test]=false&grep_regex=) to the `react-devtools-core` package and updated all v4 usage to to point to the new 4.6.0 release:

1: Manually update "react-devtools-core" versions:
```
js/package.json
js/react-native-github/package.json
nuclide/package.json
sonar/desktop/app/package.json
sonar/desktop/plugins/reactdevtools/package.json
vscode/modules/vscode-webview/package.json
```
2: Setup Yarn proxy:
```
yarn config set proxy http://fwdproxy:8080/
yarn config set https-proxy http://fwdproxy:8080
```
3: Run "yarn" in each of the above directories.
4: Run the lockfile shell script:
```
~/xplat/js/scripts/update-oss-yarn-lockfile.sh
```
5: Update the generated `MOBILE_JS_NODE_MODULE_DEPS.bzl` by running
```
js1 build buckfiles
```

## Changelog:

[General] [Changed] - Upgrade embedded React DevTools backend from v4.0.6 to v4.6.0.

Reviewed By: cpojer, gaearon

Differential Revision: D20676091

fbshipit-source-id: 99865bdba9bce45e2a7d582d5fb550cfdbeeca3a
facebook-github-bot pushed a commit to facebook/react-native that referenced this pull request Mar 26, 2020
Summary:
Upgrading the embedded version of React DevTools, primarily to pull in [this PR](facebook/react#18397) which will reduce the impact of this package on `node_modules` size.

# Update process

Following a similar process as D15973709, I began by searching for [all of the references](https://our.intern.facebook.com/intern/biggrep/?corpus=xplat&filename=.json&case=false&view=default&extre=&s=%22react-devtools&engine=apr_strmatch&context=false&filter[uninteresting]=false&filter[intern]=false&filter[test]=false&grep_regex=) to the `react-devtools-core` package and updated all v4 usage to to point to the new 4.6.0 release:

1: Manually update "react-devtools-core" versions:
```
js/package.json
js/react-native-github/package.json
nuclide/package.json
sonar/desktop/app/package.json
sonar/desktop/plugins/reactdevtools/package.json
vscode/modules/vscode-webview/package.json
```
2: Setup Yarn proxy:
```
yarn config set proxy http://fwdproxy:8080/
yarn config set https-proxy http://fwdproxy:8080
```
3: Run "yarn" in each of the above directories.
4: Run the lockfile shell script:
```
~/xplat/js/scripts/update-oss-yarn-lockfile.sh
```
5: Update the generated `MOBILE_JS_NODE_MODULE_DEPS.bzl` by running
```
js1 build buckfiles
```

## Changelog:

[General] [Changed] - Upgrade embedded React DevTools backend from v4.0.6 to v4.6.0.

Reviewed By: cpojer, gaearon

Differential Revision: D20676091

fbshipit-source-id: 99865bdba9bce45e2a7d582d5fb550cfdbeeca3a
alloy added a commit to microsoft/react-native-macos that referenced this pull request Sep 30, 2020
* Upgrade to Metro 0.59

Summary:
Upgrades RN to Metro 0.59.

Changelog: [Internal] Metro Upgrade

Reviewed By: motiz88

Differential Revision: D20533864

fbshipit-source-id: 3c5fb8e37d2363edf0b9a1a8cfbdefba00763415

* Fix mock for TextInput (#28332)

Summary:
This PR adds the `isFocused` method to the mock of the TextInput component. My understanding some of the latest changes on the TextInput to make it use a forwardRef change the way this method is mock giving an error when trying to use in on a mock.
The change suggested here fixes the issue.

## Changelog

[JavaScript] [Fixed] - Fix the mock for TextInput to support the `isFocused` method
Pull Request resolved: https://github.com/facebook/react-native/pull/28332

Reviewed By: cpojer

Differential Revision: D20538044

Pulled By: TheSavior

fbshipit-source-id: be734af105ab62ffdf9ed4017bd70845e207f8cd

* Properly handle LogBox errors during tests

Summary:
This diff fixes an issue where errors in LogBox during tests would cause the tests to crash.

The crash is due to the NativeExceptionsManager module not being mocked (as all native module need to be in tests). The fix is to properly mock the NativeExceptionManger.

This fix exposed an infinite loop issue where failures in LogBox will be logged to the ExceptionManager, which logs to the console, which logs to LogBox, creating a loop. This diff also fixes that look by moving the LogBox internal error check to the top of the monkey patched console methods.

Changelog: [Internal]

Differential Revision: D20428590

fbshipit-source-id: 7289a480c99ba8dee67772178b7629afb40b330a

* Back out "Track animations and flush them"

Summary:
Original commit changeset: b594d0e6e9b6

D20319824 introduced a problem in LayoutAnimations, which makes surfaced as the problem in T63911344. This diff reverts D20319824.

Changelog: [Internal]

Reviewed By: lunaleaps

Differential Revision: D20541918

fbshipit-source-id: ff72b839f57d39051122920a38b2632cbb5ec362

* Consolidate "dispatchMountItems" reentrancy prevention code, and retry code, in one function

Summary:
Simplifying the dispatchMountItems reentrance and retry logic.

Motivation: cleanup so I can work on dispatching ViewCommands before anything else.

Importantly, this gives us the properties that:
1) Only one function is responsible for calling dispatchMountItems
2) Only one function is responsible for deciding if we shouldn't call dispatchMountItems due to reentrance
3) Only one function is responsible for all cleanup
4) Only one function maintains all of the relevant flags (except dispatchPreMountItems... two total now, instead of 4 before)

Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D20437035

fbshipit-source-id: 5370366790eb25f653bee6c1950e747458374a61

* Only retry ViewCommand mount items if exception is marked as "Retryable"

Summary:
Instead of just blindly retrying all ViewCommands if they fail - which could be dangerous, since it's arbitrary imperative commands we'd be executing twice, potentially with bad app state - we only retry if the ViewCommand throws a "RetryableMountingLayerException".

Changelog: [Internal] Optimization to ViewCommands

Reviewed By: mdvacca

Differential Revision: D20529985

fbshipit-source-id: 0217b43f4bf92442bcc7ca48c8ae2b9a9e543dc9

* Introduce early dispatch of ViewCommands in FabricUIManager

Summary:
Earlier this week I introduced a change in the old, non-Fabric renderer (D20378633 D20427803) that (gated behind a feature-flag) executes ViewCommands before all other types of commands, as a perf optimization and (I think) a potential fix for a category of race conditions.

I've added more details in comments here.

The Fabric renderer uses the same feature-flag that I introduced for the non-Fabric renderer.

Changelog: [Internal] Fabric

Reviewed By: mdvacca

Differential Revision: D20449186

fbshipit-source-id: bb3649f565f32c417a6247369902333989a043aa

* Change nightly build from hourly to nightly (daily at 00:00) (#28346)

Summary:
We initially added the nightly build test to run every hour, in order to more quickly validate it. Now that it has been validated we can run it every night as it is intended to do.

cc hramos

## Changelog

[General] [Changed] - Change nightly build from hourly to nightly
Pull Request resolved: https://github.com/facebook/react-native/pull/28346

Reviewed By: cpojer

Differential Revision: D20550143

Pulled By: hramos

fbshipit-source-id: 9487c6785684ad6ea7e877290d50a33118090a7f

* Add diffing to app bundle size reports (#28284)

Summary:
Add diffing to app bundle size reports.

## Changelog

[Internal] [Changed] - Add diffing to app bundle size reports

Pull Request resolved: https://github.com/facebook/react-native/pull/28284

Test Plan:
- App bundle size reports should now display a diff where available
  - Right now, the database contains only one entry for the last known good iOS build
- Triggering a new build should not create additional comments

Reviewed By: cpojer

Differential Revision: D20450158

Pulled By: hramos

fbshipit-source-id: 720772275f24d3ff0a49705f4dada2efe2e99bd3

* feat: improve monorepo support by removing redundant PROJECT_ROOT (#28354)

Summary:
Historically, React Native didn't support a lot of custom project structures apart from the standard flat directory with `ios` and `android` folders. The CLI had to be explicitly started from the project root, otherwise Metro didn't work right.

In order to resolve the project root in the most accurate way, React Native assumed that project root is always `../../` from its location in `node_modules` - this is not true when the installation gets hoisted (e.g. in a monorepo).

To address that, janicduplessis brought support for custom [`PROJECT_ROOT`](https://github.com/facebook/react-native/commit/9ccde378b6e6379df61f9d968be6346ca6be7ead) that allowed overriding the `../../` in case it wasn't true.

Today, CLI is able to automatically resolve the project root, no matter where it's started. It will traverse the tree of the directories upwards and stop as soon as it meets `package.json`.

As a result, it doesn't really matter from where we start the CLI anymore as a part of `react-native-xcode.sh`.

By replacing the default value of `$REACT_NATIVE_DIR/../../` with `$PWD, that is default for all Xcode scripts, we can make the setup for monorepo easier - nobody will need to set `$PROJECT_ROOT` in order to override the incorrect defaults.

By default, all scripts defined in Xcode run from `$PWD` directory, which is the location of the iOS project. In the future, we will be able to remove `cd` entirely.

To better understand this PR, let's look a few hypothetical structures as an example:

#### Monorepo:

> tl;dr works out of the box, no need to mess around with paths

```
- package.json
- packages/
  - my-app/
     - index.js
     - package.json
     - ios/
        - MyApp.xcodeproj
```

**Before this PR**, the `react-native-xcode.sh` will start the CLI like this:

```bash
cd $REACT_NATIVE_DIR/../../
node <absolute_path_to_cli.js> bundle --entry-point index.js
```

- Because we change the directory to the root of monorepo, CLI throws an error. All in all, there's no `react-native` dependency at the workspace root.

- Some users turn `no hoist` in an act of troubleshooting the errors, which resolves the problem - `react-native` is moved under `my-app/node_modules` which makes this mechanism resolve properly.

- Some users find out about `PROJECT_ROOT` and set it to overwrite the default value. For example, setting `export PROJECT_ROOT = "$PWD/../` will set the directory to `my-app`, which has a dependency on `react-native` in a `package.json` and makes the CLI happy.

**After this PR**, the `react-native-xcode.sh` will start the CLI like this:

```bash
cd $PWD
node <absolute_path_to_cli.js> bundle --entry-point index.js
```

- The `$PWD` is `packages/my-app/ios/` because that's where the Xcode project is located. CLI will automatically set the root to `../` because that's where it finds `package.json` with `react-native` dependency. It will pass that root to Metro, unless users have set a different one themselves. Thanks to that, all paths to JavaScript files remain working and unaffected.

- No need to set `PROJECT_ROOT` anymore.

- We don't rely on the location of `node_modules`, which is cleaner and future proof.

#### Standard:

> tl;dr no changes

```
- ios/
   - MyApp.xcodeproj
- index.js
- package.json
```

**Before this PR**, the `react-native-xcode.sh` will start the CLI like this:

```bash
cd $REACT_NATIVE_DIR/../../
node <absolute_path_to_cli.js> bundle --entry-point index.js
```

- Everything works fine. Path from `react-native` inside `node_modules` is correct - the project root is set right to `/`

**After this PR**, the `react-native-xcode.sh` will start the CLI like this:

```bash
cd $PWD
node <absolute_path_to_cli.js> bundle --entry-point index.js
```

- The root will be set to where Xcode project is located, which is `/ios`. This is the PWD for all Xcode scripts.

CLI will look for the `package.json` going upwards from `ios` folder. Will stop at `/`, find out it has `react-native` dependency, load it and its commands and proceed further.

## Changelog

[iOS] [Feature] - Better monorepo support when building release apk
Pull Request resolved: https://github.com/facebook/react-native/pull/28354

Test Plan:
- All projects (standard/monorepo) run without issues.
- PROJECT_ROOT is not needed.

CC: Titozzz (who wrote monorepo guide), alloy, bartolkaruza

Reviewed By: cpojer

Differential Revision: D20558005

Pulled By: hramos

fbshipit-source-id: 2551120beadcfd4c2f1393ce8a2c2fa6b93c9290

* Fix `test_android`: Remove references to fbsource cell (#28363)

Summary:
Fixes https://github.com/facebook/react-native/issues/28361.

## Changelog

[Internal] [CI] - Fix test_android
Pull Request resolved: https://github.com/facebook/react-native/pull/28363

Test Plan:
Prior to fix:

```
react-native $ ./scripts/circleci/buck_fetch.sh
Guessing 168a69309928ba16065cdb33b1775a4af9f924a6 as the last one used version.
Using additional configuration options from /Users/hramos/.buckconfig.d/experiments, /etc/buckconfig.d/fb_chef.ini, /etc/buckconfig.d/fb_chef_override.ini
Invalidating internal cached state: Watchman failed to start. This may cause slower builds.
Parsing buck files: finished in 1.5 sec
Buck wasn't able to parse /Users/hramos/git/react-native/ReactAndroid/src/main/java/com/facebook/fbreact/specs/BUCK:
IOError: [Errno 2] No such file or directory: '/Users/hramos/git/react-native/tools/build_defs/platform_defs.bzl'
Call stack:
  File "/Users/hramos/git/react-native/.buckd/resources/168a69309928ba16065cdb33b1775a4af9f924a6/buck_server/buck_parser/profiler.py", line 507, in wrapped
    return func(*args, **kwargs)
  File "/Users/hramos/git/react-native/ReactAndroid/src/main/java/com/facebook/fbreact/specs/BUCK", line 1
    load("//tools/build_defs:platform_defs.bzl", "ANDROID")
  File "/Users/hramos/git/react-native/.buckd/resources/168a69309928ba16065cdb33b1775a4af9f924a6/buck_server/buck_parser/profiler.py", line 507, in wrapped
    return func(*args, **kwargs)

This error happened while trying to get dependency '//ReactAndroid/src/main/java/com/facebook/fbreact/specs:FBReactNativeSpec' of target '//ReactAndroid/src/main/java/com/facebook/react/devsupport:devsupport'
```
After fix:

```
react-native $ ./scripts/circleci/buck_fetch.sh
+ buck fetch ReactAndroid/src/test/java/com/facebook/react/modules
Guessing 168a69309928ba16065cdb33b1775a4af9f924a6 as the last one used version.
Using additional configuration options from /Users/hramos/.buckconfig.d/experiments, /etc/buckconfig.d/fb_chef.ini, /etc/buckconfig.d/fb_chef_override.ini
Invalidating internal cached state: Watchman failed to start. This may cause slower builds.
Parsing buck files: finished in 1.1 sec
Configuration 'ANDROID_SDK' points to an invalid directory '/opt/android_sdk'.
    When creating rule //ReactAndroid/src/main/java/com/facebook/hermes/instrumentation:instrumentation.
```

> Note: I don't have the Android SDK configured in this machine.

Verified on Circle CI. `test_android` is now green: https://circleci.com/gh/facebook/react-native/140682?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link

Reviewed By: cpojer

Differential Revision: D20564934

Pulled By: hramos

fbshipit-source-id: 5d843b8f113c4db5391ee39addc3ff259d962290

* Fix TextInput left/right padding

Summary:
This fixes two things:

1) Currently it only respects Start and End padding, and if there's a Theme default, it will override Left/Right padding. Whoops.
2) Currently it doesn't respect when a TextInput starts with padding, but then is removed.

This resolves both.

It still does not account for RTL support.

Changelog: [Internal] Fix AndroidTextInput padding

Reviewed By: mdvacca

Differential Revision: D20573151

fbshipit-source-id: e89791641b6699e728cde9dbd661a8c21485fbc8

* Validate selection range passed to setTextAndSelection

Summary:
Changelog: [Internal]

# Fabric

1. If `start` and `end` parameters in `setTextAndSelection` are -1, we don't move the cursor. Previously the cursor would be moved to beginning of text input.

2. In view commands, do not validate `eventCount`. It is passed in as undefined from JS because Fabric's text input doesn't use `eventCount`.

# Paper

1. If `start` and `end` parameters in `setTextAndSelection` are -1, we don't move the cursor. Previously the cursor would be moved to beginning of text input.

Reviewed By: shergin

Differential Revision: D20538290

fbshipit-source-id: c7aeddc25f58697254474058ce901df958321f7c

* Remove ReactTypes from fbsource and React sync

Summary:
See https://github.com/facebook/react/pull/18366

This contains a fork of the upstream Flow types. We shouldn't be syncing this since these leads to conflicting types.

As a result, these uses have already been codemodded away. Only the imports remained.

Changelog:

[React Core] - Remove ReactTypes from sync.

Reviewed By: gaearon

Differential Revision: D20583740

fbshipit-source-id: fc86a934cbdca8ff90fe90282b86ecc945a85e5f

* Fix controlled TextInput with child nodes

Summary:
Changelog: [Internal]

# There are three changes in this diff

## _stateRevision is replaced with a BOOL
`_stateRevision` was protecting against setting attributed string that is already visible to the user. Previously this was ok because the change was only coming from native, any changes from JS were ignored.

Imagine following scenario:

1. User taps key.
2. Update state is called on component initiated by native.
3. New state is created with incremented revision by one.
4. `_stateRevision` gets set to new state's revision + 1.
5. Now JS wants to change something because it just learnt that user tapped the key.
6. New state is created again with incremented revision by one.
7. Update state is called on the component, but the change isn't applied to the text view because `_state->getRevision()` will equal `_stateRevision`.

By having a BOOL instead of number, we very explicitly mark the region in which we don't want state changes to be applied to text view.

## Calling [_backedTextInputView setAttributedText] move cursor to the end of text input
This is prevented by storing what the current selection is and applying it after `[_backedTextInputView setAttributedText]` is called.
This was previously invisible because JS wasn't changing contents of `_backedTextInputView`.

## Storing of previously applied JS attributed string in state

This is the mechanism used to detect when value of text input changes come from JavaScript. JavaScript sends text input value changes through props and as children of TextInput.
We compare what previously was set from JavaScript to what is currently being send from JavaScript and if they differ, this change is communicated to the component.
Previously only first attributed string send from JavaScript was send to the component.

# Problem

If children are used to set text input's value, then there is a case in which we can't tell what source of truth should be.

Let's take following example
We have a text field that allows only 4 characters, again this is only a problem if those 4 characters come as children, not as value.
This is a controller text input.

1. User types 1234.
2. User types 5th character.
3. JavaScript updates TextInput, saying that the content should stay 1234.
4. In `TextInputShadowNode` `hasJSUpdatedAttributedString` will be set to false, because previous JS value is the same as current JS value.

Reviewed By: shergin

Differential Revision: D20587681

fbshipit-source-id: 1b8a2efabbfa0fc87cba210570142d162efe61e6

* Daily `arc lint --take BUCKFORMAT`

Reviewed By: zertosh

Differential Revision: D20593906

fbshipit-source-id: b056947c698508119dc9d4d1bba202295b8f0fda

* RN picker - implement background color

Summary:
add support to the android implementation of the Picker component for setting the background color.

Changelog: [Android] [Added] - Support item background color in Dialog Picker

Differential Revision: D20566131

fbshipit-source-id: d693b40803fa1051ec955c5728994c820fecd9e9

* Fabric: Modernizing Yoga Dirty flag test.

Summary:
Now we using TEST_F thing that allows consilidating initialization.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: mdvacca

Differential Revision: D20578788

fbshipit-source-id: 103bcb8fdeb3dbf297385cfe56415bd646e16791

* Fabric: Changing signature of `ComponentDescriptor::createState`

Summary:
This is pure syntactic change. Often we don't have a shared pointer to ShadowNodeFamily and only have just a reference. At the same time, `ComponentDescriptor::createState` does not have to accept a shared pointer. So, it's better to accept just a reference.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: sammy-SC

Differential Revision: D20578787

fbshipit-source-id: 905277001e096d41e75007575b59ea2ea15fbf4b

* Fabric: View Test: Changing state should not dirty Yoga tree (in some most cases)

Summary: Changelog: [Internal] Fabric-specific internal change.

Reviewed By: mdvacca

Differential Revision: D20578789

fbshipit-source-id: 4336165217bd39fc8065cfaeb96ef7753433d48a

* Get ReactiveNative compiled with Clang 10 (#28362)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/28362

Fixed a few compilation errors emitted by Clang 10.

Changelog:
[iOS] [Fixed] - Get ready for Clang 10

Differential Revision: D20549970

fbshipit-source-id: dc36a85d90d3e43a05f045feb57c6ab6ded67da7

* Guard against null values in object parameters for bridged methods

Summary:
Handles the case when a value in an object parameter of a turbo module spec is null (even if the type is nullable).

For example, given:
```
export interface Spec extends TurboModule {
  +myFunc: ({|
    foo: ?string,
  |}) => void;
}
```
and calling `NativeModule.myFunc({foo: null})`, we see an error like:
```
JSON value '<null>' of type NSNull cannot be converted to NSString
```
Guarding against this by converting NSNull's to nils

## Changelog:

[iOS] [Fixed] - Fix crash when passing null value in object parameter of bridged method

Reviewed By: fkgozali

Differential Revision: D20591590

fbshipit-source-id: fdb90f34131427a235f2e3c99147bf1e6a9c6732

* Modify pending deletion tags to be cross manageChildren

Summary:
Changelog: [Internal]

Removing historic layout animations index adjustment (D20323928) broke the Dating Secret Crush screen.

Since flushing animations (D20319824) had to be reverted due to issues with Saved + Privacy Shortcuts (https://fburl.com/tasks/eijtmifu) we need to track pending deletions across `manageChildren` operations.

Reviewed By: JoshuaGross

Differential Revision: D20601079

fbshipit-source-id: c6f116683750e97abe7f988cf361d2a6449e90e6

* Enable label-actions on the react-native repository (#28374)

Summary:
Enhance our issue management workflow by having the bot respond automatically whenever a label is applied to the issue.

## Changelog

[Internal] - CI
Pull Request resolved: https://github.com/facebook/react-native/pull/28374

Test Plan: Not tested. If needed, could be applied to a different, test repository.

Reviewed By: cpojer

Differential Revision: D20606887

Pulled By: hramos

fbshipit-source-id: 874d1464527ea76bf51394a7d3e98e4fd8f69345

* Fix Animated Value initialized with undefined in ScrollView (#28349)

Summary:
When passing an object to contentOffset that doesn't have `y` prop set it causes the following error:

```
 Error: AnimatedValue: Attempting to set value to undefined

This error is located at:
    in ScrollView (at src/index.js:638)
...
```

This happens since a runtime check was added to the `AnimatedValue` constructor. (a3aaa471eca58b31597b9a0669f7ade385ccb175)

According to flow types the object passed to contentOffset should always contain both x and y props but since it worked before when y is undefined I think its fine to patch the runtime behaviour defensively, especially since the code change is simple.

## Changelog

[General] [Fixed] - Fix Animated Value initialized with undefined in ScrollView
Pull Request resolved: https://github.com/facebook/react-native/pull/28349

Test Plan: Tested that the crash no longer reproduces when passing an empty object to contentOffset.

Reviewed By: cpojer

Differential Revision: D20601664

Pulled By: hramos

fbshipit-source-id: b098a2dd1e702f995a9a92fa6e4e9a204187dac4

* xplat/js/react-native-github/ReactCommon/fabric/components/textinput/

Summary: Changelog: [Internal]

Reviewed By: scottrice

Differential Revision: D20619227

fbshipit-source-id: 674337e6ce585a4e96d020f9624b874ba86e2d80

* Seed ssh known hosts with github's public key (#28370)

Summary:
The [previous attempt](https://github.com/facebook/react-native/pull/28304) to fix the publish step failed, so now reverting to manually configuring things. This PR adds an entry to SSH’s `known_hosts` file using github.com’s public key that I have verified as per [these instructions](https://serverfault.com/a/807363):

```
~/C/R/react-native [master] » nmap github.com --script ssh-hostkey
Nmap scan report for github.com (140.82.118.4)
rDNS record for 140.82.118.4: lb-140-82-118-4-ams.github.com
PORT     STATE SERVICE
22/tcp   open  ssh
| ssh-hostkey:
|   1024 ad:1c:08:a4:40:e3:6f:9c:f5:66:26:5d:4b:33:5d:8c (DSA)
|_  2048 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48 (RSA)
```

These fingerprints line up with [the ones posted by GitHub](https://help.github.com/en/github/authenticating-to-github/githubs-ssh-key-fingerprints), so my setup should be good and can be trusted to grab the public key from the right host:

```
~/C/R/react-native [master] » ssh-keyscan -t rsa -H github.com
# github.com:22 SSH-2.0-babeld-d48c3acd
|1|If6MU203eXTaaWL678YEfWkVMrw=|kqLeIAyTy8pzpj8x8Ae4Fr8Mtlc= ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==
```

## Changelog

[Internal] [Fixed] - Make automated publishing of packages from CI work again
Pull Request resolved: https://github.com/facebook/react-native/pull/28370

Test Plan: I used the command being added in this PR in [a failed CI job](https://app.circleci.com/pipelines/github/facebook/react-native/4104/workflows/916127cb-177f-4583-9f90-cae5318041d8/jobs/140810). When I invoked the publish script manually I was not greeted by the blocking prompt and the package was successfully published: https://www.npmjs.com/package/react-native/v/0.0.0-56cf99a96

Reviewed By: cpojer

Differential Revision: D20601527

Pulled By: hramos

fbshipit-source-id: b1a4405228408cfc4a1b3b44ab88c79522af3a66

* Fix app bundle size diff not always being compared against latest commit (#28368)

Summary:
- Timestamp of entries in our Firebase instance sometimes get stored as number. This means that we may not always be diffing against the latest master commit.
- Size report of Android and iOS gets overwritten depending on which build finishes first.

## Changelog

[Internal] [Fixed] - App bundle size diff not always being compared against latest commit
[Internal] [Fixed] - Android and iOS app bundle size diff overwrite each other
Pull Request resolved: https://github.com/facebook/react-native/pull/28368

Test Plan:
- We are now using Firebase's own [firebase.firestore.Timestamp.now](https://firebase.google.com/docs/reference/js/firebase.firestore.Timestamp#now) to ensure that we always get a timestamp in the preferred format. This has been tested locally but can only be verified when merged to master and we start getting new data. In the meantime, I'll manually fix up all the entries in the store.
- There should be one app bundle size comment for Android and one for iOS in this PR.

Reviewed By: cpojer

Differential Revision: D20601620

Pulled By: hramos

fbshipit-source-id: 0c3e4b78a74cbd659f1957a6aa74322b016e0646

* Hopefully fix so loading crashes

Summary:
Changelog:

[Android][Internal] Fix potential initializer interruption threading crashes.

Reviewed By: mdvacca

Differential Revision: D20615755

fbshipit-source-id: 58b706deeb6df1998caff5bf2ae9ec60114313fe

* Fix label-actions configuration

Summary:
Adds back a missing label key, fixes open source issue: https://github.com/facebook/react-native/issues/28378

Changelog:
[Internal] [CI] - Fix label-actions config

Reviewed By: cpojer

Differential Revision: D20625887

fbshipit-source-id: 63c90db249aa9c15369a4b5bcab71cbe75c6d4b8

* Changing Order Of mOverrideColorScheme In Constructor

Summary:
Changelog: [Android] [Updated]

mOverrideColorScheme should be assigned before the first colorSchemeForCurrentConfiguration call, so the initial setting of mColorScheme will reflect the override

Reviewed By: zackargyle

Differential Revision: D20630173

fbshipit-source-id: a2a2d174d3fc40c14f27dce6a7fa8e67203480c9

* hermes | inspector | Don't include posix headers on non-posix systems

Summary:
Changelog: [Internal]

Hermes inspector includes pthreads, arpa and sys headers on all OSes that would break vanilla Windows builds. This diff adds a check for posix-compliance before inclusion

(Note: this ignores all push blocking failures!)

Reviewed By: dulinriley

Differential Revision: D20564449

fbshipit-source-id: 8e264bc3104065dc4315bb291e8560609fe65184

* Upgrade Prettier from 1.17 to 2.0.2.

Summary:
This gets us on the latest Prettier 2.x:
https://prettier.io/blog/2020/03/21/2.0.0.html

Notably, this adds support for TypeScript 3.8,
which introduces new syntax, such as `import type`.

Reviewed By: zertosh

Differential Revision: D20636268

fbshipit-source-id: fca5833d003804333a05ba16325bbbe0e06d6c8a

* Back out "Upgrade Prettier from 1.17 to 2.0.2."

Differential Revision: D20639755

fbshipit-source-id: 5028563f9cf0527a30b4259daac50cdc03934bfd

* Fabric: Additional temporary checks in prop parsing infra

Summary:
While ViewConfig infra isn't perfect we need to check some value for correctness during prop-parsing.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: JoshuaGross

Differential Revision: D20639055

fbshipit-source-id: 193dcd0769bc7777bc8d60c964ede72ebdaa83e4

* Update React package

Summary:
This just updates the `react` package to the latest stable version. We updated it to experimental internally earlier so this brings the open source version to the latest before the branch cut. This doesn't include any breaking changes.

Changelog:

[General][Changed] - Update to React 16.13.1

Reviewed By: cpojer

Differential Revision: D20642909

fbshipit-source-id: 68a4c74bfe72f1abdb33b0b9071a4f4e8e568318

* Fix sketchy null checks induced by new formatting in Prettier 2.0

Summary:
Update code to prepare for Prettier 2.0, which will
reformat `a || (b || c)` to `a || b || c`.

Changelog: [Internal] prepare for Prettier 2.0

Reviewed By: kassens

Differential Revision: D20639483

fbshipit-source-id: c2932b1495884684172ba9291d56c546f51711b8

* RN picker - fix types in AndroidDialogPickerManagerInterface

Summary:
according to [this crash report](https://our.intern.facebook.com/intern/logview/details/facebook_android_crashes/7ba7056481015482c6166d65cb97e49d/?trace_key=1506fe36a70dd5e50cdc8968f6317f27), `value` was throwing an NPE despite being null-checked. this is because it was an `int` rather than an `Integer`, so the null check wasn't working

Changelog: Fix types in AndroidDialogPickerManagerInterface

Reviewed By: mdvacca

Differential Revision: D20646343

fbshipit-source-id: a27587e0a48f5782bcf5ffddb604018218e65206

* Remove RCTExportModule log spam

Summary:
The bridge complains if modules aren't exported, which isn't really helpful with lazily loaded modules and turbo modules.

I considered only turning this off when TurboModules is enabled, but figured we'd be killing this soon anyways... If anyone feels strongly I can go that approach.

Changelog: [iOS][Internal] Remove RCTExportModule log spam

Reviewed By: shergin

Differential Revision: D20629575

fbshipit-source-id: d32d9fe244c4d06acfee982fca7c7f63da294dc5

* De-jank DevLoadingView

Summary:
## Problems
Repro steps:
1. Disable Fabric (because CMD + R doesn't work with Fabric right now).
2. Open up Marketplace and hit `CMD + OPT + R`
3. **Observe:** The progress bar doesn't show up right away. It also doesn't actually show progress.
https://pxl.cl/140g1

RN Support post: https://fb.workplace.com/groups/rn.support/permalink/3437652016283389/

## Fixes
The first problem is that progress bar doesn't actually show progress.

**Fix:** Bundle load progress is updated in `RCTCxxBridge`, where we first require `RCTDevLoadingView`, and then call its `updateProgress` method. Previously, we wouldn't  lazily load `RCTDevLoadingView`, it already didn't exist. Lazily loading `RCTDevLoadingView` causes the progress view to show up. Here: https://pxl.cl/140gt

If you look at the above video, you'll notice there are two stages to the progress bar: stage 1 displays the actual progress. Stage 2 prompts that we're downloading the JS bundle. As you can see, stage 1 and stage 2 have different background colors, even though both of them are green.

**Fix:** I adjusted the JS to match the Native color. Here: https://pxl.cl/140gT

We're almost there, but the progress bar is dismissed twice?

**Fix:** I dug into the code, and the reason why was because when we hit `CMD + R`, we invalidate the bridge, and immediately re-initialize it. This means that we asynchronously invalidate the old TurboModuleManager, and immediately create a brand new one. Therefore, two `RCTDevLoadingView` modules can (and do) exist at once. So, I moved `RCTDevLoadingView` to be an instance member of `FBReactModule`, to ensure that it doesn't get cleaned up and re-created when TurboModuleManager is deleted and re-created. This finally fixed the progress bar jank:
https://pxl.cl/140hn

Changelog:
[iOS][Fixed] - Remove RCTDevLoadingView jank

Reviewed By: rickhanlonii

Differential Revision: D20607815

fbshipit-source-id: 05825c67adaf3cfda70be0fa2dc92d413dc8921b

* Fix retaining self in block in LogBox impl

Summary:
Logbox has a retain cycle (see linked task for my deeper investigation).

This diff doesn't fix the retain cycle, but it's just good practice to not retain self strongly in blocks.

Changelog: [iOS][Internal] Fix retaining self in block in LogBox implementation

Reviewed By: shergin

Differential Revision: D20630693

fbshipit-source-id: cf399495e9bcd1917932fcc0e9c9d2d2a32bf6f0

* Flow type infoLog

Summary:
Changelog:
[General][Internal] flow type infoLog

Reviewed By: zackargyle

Differential Revision: D20577939

fbshipit-source-id: eed4401b2ae0a6bf845fdcb54c6abe1fe98fe7c1

* Replace fbsource// with // in xplat/js/ files [1]

Summary:
`fbsource//xplat` and `//xplat` are equivalent for FB BUCK targets. Removing extra prefix for consistency.

Changelog: [Internal]

Reviewed By: scottrice

Differential Revision: D20495655

fbshipit-source-id: a57b72f694c533e2e16dffe74eccb8fdec1f55f5

* Deploy Flow 0.121 to Xplat (#901)

Summary:
Deploy Flow 0.121 to Xplat

bypass-lint
allow-large-files

Closes https://github.com/facebook/flipper/pull/901

Changelog: [Internal]

Reviewed By: panagosg7

Differential Revision: D20570316

fbshipit-source-id: a76983d6f46c8b995ce2dd5cd1e014534790698a

* Replace fbsource// with // in xplat/js/ files [3]

Summary:
`fbsource//xplat` and `//xplat` are equivalent for FB BUCK targets. Removing extra prefix for consistency.

Changelog: [Internal]

Reviewed By: JoshuaGross

Differential Revision: D20656211

fbshipit-source-id: deb91b917d349bc500acbb03d734ff621f6e1fc7

* Replace fbsource// with // in xplat/js/ files [4]

Summary:
`fbsource//xplat` and `//xplat` are equivalent for FB BUCK targets. Removing extra prefix for consistency.

Changelog: [Internal]

Reviewed By: JoshuaGross, shergin

Differential Revision: D20656696

fbshipit-source-id: 10f02decb1dc969fd3491ac90d97f09e2bda59e7

* Add Needs: Repro bot action (#28397)

Summary:
Add automated response for Needs: Repro

## Changelog

[Internal] [Added] - Add automated response for Needs: Repro
Pull Request resolved: https://github.com/facebook/react-native/pull/28397

Test Plan: Bot should add a comment with the Needs: Repro label.

Reviewed By: cpojer

Differential Revision: D20665378

Pulled By: hramos

fbshipit-source-id: 1c7d878faacf935a640849f74c81f119e5c7e92d

* Daily `arc lint --take CLANGFORMAT`

Reviewed By: zertosh

Differential Revision: D20666684

fbshipit-source-id: 32255ac7509e0257693969a7b4b044569af30df7

* ✅ Green CI: Fix JavaScript e2e tests, disable failing Android e2e test (#28392)

Summary:
Jobs now have a `run_disabled_tests` argument that allows for the selective execution of disabled tests. When working on re-enabling a failing test, the contributor just needs to set `run_disabled_tests` to `true` in the appropriate workflow in `.circleci/config.yml`.

Tests can be kept green by moving failing tests into the disabled section until a contributor can provide a fix, thus ensuring signal is maintained on master. For example, a failing end-to-end test might be disabled in order to allow the signal from unit tests to be provided, as opposed to flat out failing the entire job.

What was done in this PR:
* The failing `test_js_e2e` job has been fixed, and merged into the `test_js` job. An empty disabled tests section is added for future use.
* The failing `test_ios_e2e` job has been merged into `test_ios`, with all of its steps gated behind the `run_disabled_steps` argument.
* The failing Android end-to-end tests have been added to `test_android`, gated behind the `run_disabled_steps` argument
* The failing Podspecs test has been added back into `test_ios`, gated behind the `run_disabled_steps` argument

## Changelog

[Internal] [CI] - ✅ Green CI, disabled test infrastructure work
Pull Request resolved: https://github.com/facebook/react-native/pull/28392

Test Plan: Verified on Circle CI

Reviewed By: cpojer

Differential Revision: D20665512

Pulled By: hramos

fbshipit-source-id: 831738027f90f4b23313893d8342d7e654f34726

* Upgrade internal packages to support ESLint >= 6 (#28393)

Summary:
Fixes https://github.com/facebook/react-native/issues/28293

I've tested it with https://github.com/react-native-community/react-native-template-typescript and it seems to be working as expected - no warnings, supports typescript 3.8.

(note: I didn't upgrade the package version as I don't know how the releases work for this package)

## Changelog

[CATEGORY] [TYPE] - Message
Pull Request resolved: https://github.com/facebook/react-native/pull/28393

Reviewed By: hramos

Differential Revision: D20647112

Pulled By: cpojer

fbshipit-source-id: ca6b67971f625dc8125a58f9220dfcd86250ba94

* Fabric: Fixing a deadlock in RCTSurfacePresenter

Summary:
This is another attempt to fix an issue very similar to T59424871. The previous attempt was in D19249490. I don't know why we don't see production crashes (stalls) but it happened to me (and not to me) in the debugger. The previous attempt didn't work because we still could have a deadlock because we tried to acquired shared mutex already owned exclusively by the `suspend` method.

Here is another approach: Instead of using one shared mutex, now we use two. One is similar to what we had and another that protects `suspend` and `resume`. Besides that, now we pass a Scheduler to functions that use that explicitly. This way we can be more explicit about acquiring mutexes and the overall flow of execution. The idea is: Now an arbitrary code that can be reentrant does not cover with mutexes, so the deadlock is not possible.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: sammy-SC

Differential Revision: D20639228

fbshipit-source-id: 98515742f00f2ae94b50b585c9f1f0611e169ebe

* Update React Hooks Plugin

Summary:
Updates `eslint-plugin-react-hooks` to 3.0.0. This introduces a new lint error when you use a Hook inside a class.

Changelog:
[General][Changed] - Updated the React Hooks ESLint Plugin

Reviewed By: cpojer

Differential Revision: D20675528

fbshipit-source-id: d0cbe9748fd15df7a4c6de00bd1462610e0a43d6

* Upgrade React DevTools 4.0.6 -> 4.6.0

Summary:
Upgrading the embedded version of React DevTools, primarily to pull in [this PR](https://github.com/facebook/react/pull/18397) which will reduce the impact of this package on `node_modules` size.

# Update process

Following a similar process as D15973709, I began by searching for [all of the references](https://our.intern.facebook.com/intern/biggrep/?corpus=xplat&filename=.json&case=false&view=default&extre=&s=%22react-devtools&engine=apr_strmatch&context=false&filter[uninteresting]=false&filter[intern]=false&filter[test]=false&grep_regex=) to the `react-devtools-core` package and updated all v4 usage to to point to the new 4.6.0 release:

1: Manually update "react-devtools-core" versions:
```
js/package.json
js/react-native-github/package.json
nuclide/package.json
sonar/desktop/app/package.json
sonar/desktop/plugins/reactdevtools/package.json
vscode/modules/vscode-webview/package.json
```
2: Setup Yarn proxy:
```
yarn config set proxy http://fwdproxy:8080/
yarn config set https-proxy http://fwdproxy:8080
```
3: Run "yarn" in each of the above directories.
4: Run the lockfile shell script:
```
~/xplat/js/scripts/update-oss-yarn-lockfile.sh
```
5: Update the generated `MOBILE_JS_NODE_MODULE_DEPS.bzl` by running
```
js1 build buckfiles
```

## Changelog:

[General] [Changed] - Upgrade embedded React DevTools backend from v4.0.6 to v4.6.0.

Reviewed By: cpojer, gaearon

Differential Revision: D20676091

fbshipit-source-id: 99865bdba9bce45e2a7d582d5fb550cfdbeeca3a

* Make ScrollView use ForwardRef

Summary:
Have ScrollView use forwardRef so that the host component methods like `measure` and `measureLayout` are available without having to call `getNativeScrollRef`. Instead, you can use `<ScrollView ref={myRef} />` and directly call all methods of ScrollView and host components on `myRef`.

Previous usage:
```
const myRef = React.createRef<React.ElementRef<typeof ScrollView>>();
<ScrollView ref={myRef} />

const innerViewRef = myRef.current.getNativeScrollRef();

innerViewRef.measure();
```
New usage:
```
const myRef = React.createRef<React.ElementRef<typeof View>>();
<ScrollView ref={myRef} />

// now, myRef.current can be used directly as the ref
myRef.current.measure();
myRef.current.measureLayout();

// Additionally, myRef still has access to ScrollView methods
myRef.current.scrollTo(...);
```

Changes:

* Added deprecation warnings to ScrollView methods `getNativeScrollRef`, `getScrollableNode`, and `getScrollResponder`
* Added the forwardRef call to create `ForwardedScrollView` - this takes in `ref` and passes it into the class ScrollView as `scrollViewRef`.
* Forwarded the ref to the native scroll view using `setAndForwardRef`.
* Added statics onto `ForwardedScrollView` so that `ScrollView.Context` can still be accessed.
* Added type `ScrollViewImperativeMethods`, which lists the public methods of ScrollView.
* Converted all public methods of ScrollView to arrow functions. This is because they need to be bound to the forwarded ref.
* Bound all public methods of ScrollView to the forwarded ref in the `setAndForwardRef` call.
* Flow typed the final output (ForwardedScrollView) as an abstract component that takes in the props of the `ScrollView` class, and has all methods of both the inner host component (`measure`, `measureLayout`, etc) and the public methods (`scrollTo`, etc).

Changes to mockScrollView:
* Changed mockScrollView to be able to mock the function component instead of a class component
* Updated necessary tests

Changelog:
[General] [Changed] - Make ScrollView use forwardRef

Reviewed By: TheSavior

Differential Revision: D19304480

fbshipit-source-id: 6c359897526d9d5ac6bc6ab6d5f9d82bfc0d8af4

* Fix issue with onEndReached

Summary:
onEndReached can be triggered twice when more items are added to the end of the list. This change makes it so that a second call to onEndReached won't happen until the user scrolls down to the new end of the list.

Changelog:

[General] [Fixed] - Fix double call to onEndReached in VirtualizedList

Reviewed By: sahrens

Differential Revision: D20066740

fbshipit-source-id: 129d7ae6bfd241eeea18fe0bb12b82be67735874

* Remove console warnings from ScrollView methods

Summary:
The newly added console warnings in D19304480 are adding a lot of warning noise due to missed infra callsites. Those callsites need to be updated before these warnings can be added.

Changelog:
[Removed] Remove console warnings from ScrollView methods

Reviewed By: rickhanlonii

Differential Revision: D20700917

fbshipit-source-id: cb618ee3a291d26e1942e4f91bbc02dee41fb78b

* Upgrade react-docgen, jscodeshift and flow-parser

Summary:
In preparation for upgrading babel, I'm updating some of our source transform tools to the latest versions.

Changelog: [Internal]

Reviewed By: GijsWeterings

Differential Revision: D20675201

fbshipit-source-id: fa4fee2652529c6677087e42cdd1325a8080e46f

* Ship State Reconciliation 100% on all platforms

Summary:
State Reconciliation has been running 50/50 for a while and all metrics look stable. This is necessary for providing a good experience so we should ship to everyone unconditionally.

Changelog: [Internal] Fabric diffing reconciliation process improvement

Reviewed By: mdvacca

Differential Revision: D20715694

fbshipit-source-id: 25b2635ecc29b67e2911679c9db66bc84d37dec1

* Core telemetry tests: update so they pass on my machine

Summary:
`std::this_thread::sleep_for` is not really precise and will attempt to sleep for "at least" that much time, but may sleep much longer depending on what CPUs are doing and scheduling policies.

To get this to pass on my machine, I had to substantially increase the thresholds.

Changelog: [Internal]

Reviewed By: shergin

Differential Revision: D20689571

fbshipit-source-id: f159420d24a95da2b5d95d49ed7882e783291e98

* Optimize diff algorithm to produce fewer remove+insert ("move") paired instructions

Summary:
An evolution of D20633188 but more performant.

There are three optimized paths before the slow path.

The first optimized path tries to pair identical nodes from old/new tree, and generate Update mutations, until we hit nodes that are different (indicating either a remove or an insert). This already existed.

The next two optimizations, introduced by Tim in his JS pseudocode, were inspired by ReactJS's diffing algorithm. They work in cases where the rest of the nodes are (1) all removals/deletes or (2) all creates+inserts.

Finally, if those final two optimized paths can't run, it's because there is a mix of delete+remove, create+insert, and "move" operations, mixed at the beginning, middle, and/or end of the list.

This has slightly better average/best-case complexity as the previous implementation.
In particularly pathological cases where all nodes are arbitrarily reordered, or reversed, for instance (ABCDE->EDCBA) the algorithm has the same complexity as the previous algorithm (quadratic).

For now iOS is pinned to the older differ

Changelog: [Internal] Experiment to optimize diffing algorithm in Fabric

Reviewed By: shergin

Differential Revision: D20684094

fbshipit-source-id: d29fba95a0328156c023e1c87804f23770ee1d91

* Unit test for V2 "minimal instruction" diffing algorithm

Summary:
This unit test is to verify that the new diffing algorithm generates a "minimal" instruction set, with regards to removes and inserts ("moves").

These unit tests are here to verify the expected behavior in this new algorithm, but these tests may be modified or deleted in the future if we decide we want to change this behavior.

Changelog: [Internal] fabric unit test

Reviewed By: mdvacca

Differential Revision: D20706592

fbshipit-source-id: 5f9991498e0d788ecbf88d938bfe6d3f0f27af40

* Add ES Lint rules for `DynamicColorIOS()`and `ColorAndroid()` (#28398)

Summary:
The [PlatformColor PR](https://github.com/facebook/react-native/pull/27908) added support for iOS and Android to express platform specific color values.   The primary method for an app to specify such colors is via the `PlatformColor()` method that takes string arguments.   The `PlatformColor` method returns an opaque Flow type enforcing that apps use the PlatformColor method instead of creating Objects from scratch -- doing so would make it harder to write static analysis tools around Color values in the future.   But in addition to `PlatformColor()`, iOS has a `DynamicColorIOS()` method that takes an Object.   The Flow type for this Object cannot be opaque, but we still want to enforce that app code doesn't pass variables instead of Object literals or that values in the Objects are variables.   To ensure `DynamicColorIOS()` can be statically analyzed this change adds an ESLint rule to enforce that `DynamicColorIOS()` takes an Object literal of a specific shape.   A `ColorAndroid()` was also introduced not for practical use but just to test having platform specific methods for more than one platform in the same app.   A second ESLint rule is created for `ColorAndroid` as well.

## Changelog

[General] [Changed] - Add ES Lint rules for `DynamicColorIOS()`and `ColorAndroid()`
Pull Request resolved: https://github.com/facebook/react-native/pull/28398

Test Plan: `yarn lint` passes.

Reviewed By: cpojer

Differential Revision: D20685383

Pulled By: TheSavior

fbshipit-source-id: 9bb37ccc059e74282b119577df0ced63cb9b1f53

* fix: Android gradle config when bundling for release (#28415)

Summary:
This fix aims to address the issue when bundling an Android app for release and getting the error exhibited in https://github.com/facebook/react-native/issues/28002 which I also encountered myself.

The config was changed sometime in November 2019 (as part of https://github.com/facebook/react-native/issues/26940, commit https://github.com/facebook/react-native/commit/a3b08048674e324dbe1f0ca816f35607e9e06a2f) to be very opinionated when it comes to the use of `npx` which Gradle itself cannot find anyway (I have `npx` installed globally and it didn't pick it up).

Another issue that the use of `npx` creates is that Gradle should only ever use the currently installed react-native cli rather than a (possibly) higher version which may not always have backward compatibility.

The proposed change simply throws a more descriptive error rather than defaulting to a tool which may or may not exist on the machine, be it CI or a development environment. I've also modified the RNTester app to reflect the correct config implementation relative to the RNTester app itself.

In real projects, the config inside `android/app/build.gradle` should look similar to the following snippet:

```
project.ext.react = [
  cliPath: "$rootDir/../node_modules/react-native/cli.js",
  entryFile: "index.js"
];
```

## Changelog
[Android] [Fixed] - Gradle release config
Pull Request resolved: https://github.com/facebook/react-native/pull/28415

Test Plan:
- [x] Successfully bundled an Android release build with correct config
- [x] Works with RNTester app

Reviewed By: mdvacca

Differential Revision: D20714372

Pulled By: hramos

fbshipit-source-id: 4d66139249c6f840582a71a48c64e6a6595f7af0

* Reimplement D19965405: Small improvements in Differentiator/TinyMap

Summary:
Two things:
1) I reimplement Valentin's idea in D19965405, so that TinyMaps can be iterated over, with a couple of bugfixes (calling front() or back() on an empty vector will crash).
2) I now use TinyMap instead of better::map in the "optimized" diffing algorithm.
3) `erase` now actually removes elements from the vector, but only when more than half of elements have been erased.
4) If you repeatedly erase elements at the beginning of the vector, they will no longer be iterated over. This is a specific optimization for our heaviest TinyMap use-cases.

These amount to some small but hopefully somewhat meaningful perf improvements.

Changelog: [Internal] Fabric perf

Reviewed By: shergin

Differential Revision: D20718719

fbshipit-source-id: 91f4b2e2e0f6387ae484e43d5b0095103087baa6

* Remove LayoutInspectingPolicy.includeScrollViewContentOffset

Summary:
`LayoutInspectingPolicy` has two flags, `includeTransform` and `includeScrollViewContentOffset`.

`includeScrollViewContentOffset` seems to be redundant for two reasons.

# 1st
From looking at callers, they have always the same value.
I looked at all call sites, and they are either always both set to true or both set to false.

# 2nd
The way we include scroll view content offset, is through transformation, so setting `includeTransform` to true and `includeScrollViewContentOffset` to false will include content offset anyway. In order to make both flags work, we would need to introduce further changes to `getRelativeLayoutMetrics`. But since the flag isn't used anyway, I think it is better to get rid of it for now. If we need it in the future, we could re-introduce it.

Reviewed By: shergin

Differential Revision: D20622256

fbshipit-source-id: fb6156c66b752319ea928239fa723ff90688b0a0

* Add support for translation and rotation to operator * between Rect and Transform

Summary:
Changelog: [Internal]

Until now `Rect operator*(Rect const &rect, Transform const &transform)` supported only scaling. Now it supports translation and rotation as well.

Reviewed By: shergin

Differential Revision: D20622876

fbshipit-source-id: 1b65393bd3fd6fd9a8941903e0f2681a10097e4a

* Include transform property when calling getRelativeLayoutMetrics

Summary:
Changelog: [Internal]

Current implementation of `measure` doesn't take transform into account..

So if you had a view which has width and height 100 and had `Scale(0.5, 0.5, 1)` (this will shrink view by half). Calling `getRelativeLayoutMetrics` would report its size being `{100, 100}`.
This applies if view's parent has transformation as well, because transformation is applied to all subviews of the view as well.

Reviewed By: mdvacca

Differential Revision: D20621590

fbshipit-source-id: 2cf902a0494291c821ecada56f810c5e6620db5a

* feat: migrate appveyor to circleci (#28245)

Summary:
This issue closes https://github.com/facebook/react-native/issues/28241
Migrated Windows test from AppVeyor to CircleCI

## Changelog

[Internal] [Changed] - Migrated Windows test from AppVeyor to CircleCI
Pull Request resolved: https://github.com/facebook/react-native/pull/28245

Test Plan: For CircleCI to Pass

Reviewed By: cpojer

Differential Revision: D20689163

Pulled By: hramos

fbshipit-source-id: 285c762457ef00f7884ee9157b3f336044c0452f

* Remove "Debug with Nuclide" option

Summary: This is no longer needed.

Reviewed By: cpojer

Differential Revision: D20722274

fbshipit-source-id: 5bc3104e90811d724f42aadbf137ab8eff718ca0

* experiment to preload RN bridge after fb4a bookmarks render

Summary:
Changelog:
[Android][Internal] add internal supermodule label

Reviewed By: mdvacca

Differential Revision: D20434200

fbshipit-source-id: fae50309cdd0df4a4523c2f88d1c8e01a7163575

* Fix CursorDrawable Color Tint for Android 10+

Summary:
Accessing this field via reflection is explicitly blacklisted by Google in Android 10 and higher. They have provided a new API to change the color, which I have implemented here. [The old setColorFilter is deprecated](https://developer.android.com/reference/android/graphics/drawable/Drawable#setColorFilter(int,%20android.graphics.PorterDuff.Mode)) so I also updated that method call as well.

Changelog: [General] [Fixed] Use new setTextCursorDrawable API for Android 10

Reviewed By: JoshuaGross

Differential Revision: D20656068

fbshipit-source-id: 58a92b57c0a892c7c87fc5d735e4ceaa4e987ec7

* Early return on tinting CursorDrawable if no color supplied

Summary:
There's (potentially) a lot of expensive reflection calls here that, as best I can tell, end up being ignored if the supplied color is null. Better to early return.

Changelog: [General] [Internal] Preclude reflection when setting cursor color if color is null

Reviewed By: JoshuaGross

Differential Revision: D20670594

fbshipit-source-id: 480a988355bbd79008002c4326d4b35035ec2a95

* Partial React Sync for Inspector

Summary:
Partial sync for React that includes:

- https://github.com/facebook/react/pull/18388
- https://github.com/facebook/react/commit/dd7e5e4f5ac2ffac3171ef61daee2cb1edc69635

Created from this branch: https://github.com/facebook/react/compare/master...rickhanlonii:rh-partial-3-24?expand=1

Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D20651395

fbshipit-source-id: 67baf7c407f75d9fd01c17f2203a77a38567100e

* Enable inspector for Fabric

Summary:
## Overview
This diff refactors the Inspector, moving logic to look up view data for a touched view inside the renderer as `getInspectorDataForViewAtPoint`. We then implement that same function for Fabric in order to support the inspector in that renderer.

Requires https://github.com/facebook/react/pull/18388

## Motivation

Reason one for this refactor is that, previously, the inspector held all of the logic to look up view data for a given x,y touch coordinate. To do this, it would take the React tag and coordinates, look up the native view tag, measure it, and then ask React internals for the Fiber information of that tag. All of this is deeply coupled to React internals, yet the logic is outside of React core in the Inspector.

Reason two is that, for Fabric, the logic for getting the view data is different than Paper. In Fabric, we pass the x,y coordinates to native directly, which returns an instance handle. That handle can be used to measure the ShadowNode, or retrieve the Fiber information.

By moving the logic into the renderer in React core, we decouple the implementation details of looking up view data for a tapped point and allow ourselves the ability to add and change renderer-specific code for the actual lookup without impacting outsiders like the Inspector.

Changelog: [Internal]

Reviewed By: TheSavior

Differential Revision: D20291710

fbshipit-source-id: a125223f2e44a6483120c41dc6146ad75a0e3e68

* chore: update url of warning message from deprecated imports (#28452)

Summary:
Some of the repository name of Lean Core(https://github.com/facebook/react-native/issues/23313) libraries has been renamed.
This PR updates the warning message to display the updated url.

## Changelog

[General] [Changed] - Update warning message of deprecated imports
Pull Request resolved: https://github.com/facebook/react-native/pull/28452

Test Plan: updated URL can be accessed.

Reviewed By: cpojer

Differential Revision: D20745184

Pulled By: TheSavior

fbshipit-source-id: 2c3ed6a000b45022ca6c4862305aa567c4d18b2e

* Add `upgrade-support` link on issue creation (#28411)

Summary:
This PR adds a https://github.com/react-native-community/upgrade-support link for the user when creating an issue.
Changelog:
[Internal]

Pull Request resolved: https://github.com/facebook/react-native/pull/28411

Reviewed By: cpojer

Differential Revision: D20714274

Pulled By: hramos

fbshipit-source-id: 4ca42224a50e386b95f21f0fb236a917e1b6b982

* Update PixelRatio 'getFontScale' method description (#28407)

Summary:
Refs facebook/react-native-website#1776.

Despite in-code description `PixelRatio.getFontScale()` is working properly on the iOS (it also reflects the user settings).

This PR updates the in-code description to match current behaviour.

I have decided to skip in the code information about additional setting in `Accessibility` menu and in `Control Centre`, but if you think it is important just let me know, I can update this PR.

## Changelog

[Internal] [Fixed] - Fix PixelRatio getFontScale method description
Pull Request resolved: https://github.com/facebook/react-native/pull/28407

Test Plan: N/A

Differential Revision: D20750260

Pulled By: shergin

fbshipit-source-id: c40ec2fd49cd60e2975351c3a1c453aab0045da4

* Remove allowDisablingImmediateExecutionOfScheduleMountItems feature flag

Summary:
No longer needed.

Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D20747684

fbshipit-source-id: a8077519b7670d72e23267b1c1423556ec97be3f

* RuntimeExecutor helpers that modify the way of the callback is being executed.

Summary:
Here we implement a bunch of helper methods that allow customizing the behavior of a RuntimeExecutor "on-demand" on the caller side. We will use it in the next diff(s).

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: PeteTheHeat

Differential Revision: D20551411

fbshipit-source-id: 51d3cd02b69753110c0e1155347c6e52eb882c7d

* Fabric: Using `executeSynchronouslyOnSameThread_CAN_DEADLOCK` in MainRunLoopEventBeat

Summary:
We are replacing inline-ed implementation with practically the same one implemented as the helper method.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: sammy-SC

Differential Revision: D20551409

fbshipit-source-id: fcc6f497cd240af65fba534051c217fe5746ce82

* Set RootNodeKind trait in ModalHostViewShadowNode

Summary:
Changelog: [internal]

`ModalHostViewShadowNode` didn't have `RootNodeKit` trait, therefore `getRelativeLayoutMetrics`  was including nodes in ancestors that it shouldn't have.

Reviewed By: shergin

Differential Revision: D20735801

fbshipit-source-id: 6b81e3b174c2f82e530abc2bca2da8bebc2270b0

* mention RNTester app in contributor guide (#28042)

Summary:
motivation is following - the RNTester app is imho the best place to try out any changes that a contributor would make, yet it is not directly mentioned in the contributor guide. This fixes it.

## Changelog

[Internal] - Docs
Pull Request resolved: https://github.com/facebook/react-native/pull/28042

Test Plan: not necessary

Reviewed By: TheSavior

Differential Revision: D20401260

Pulled By: hramos

fbshipit-source-id: 01c1b7dff56b59909c94b2feb609650f0baba1a9

* Buck: Use Android SDK 29 during build (#28455)

Summary:
Fixes `test_android` and `test_docker` build failures. Thanks to dulmandakh for identifying the fix.

Changelog:
[Internal] [Android] [Changed] - Use Android SDK 29 to build during CI tests
Pull Request resolved: https://github.com/facebook/react-native/pull/28455

Test Plan: Circle CI shows `test_android` and `test_docker` passing: https://app.circleci.com/jobs/github/facebook/react-native/142273

Reviewed By: sturmen

Differential Revision: D20766589

Pulled By: hramos

fbshipit-source-id: 8ef8a8ce3a6e7353ae47425accb3bd26cf1608c4

* Assign orderIndex_ in ConcreteViewShadowNode constructor instead of ViewShadowNode's constructor

Summary:
Changelog: [Internal]

`orderIndex_` was only being assigned for `ViewShadowNode`, not for other `ShadowNodes` that are later represented on the screen.

Reviewed By: shergin

Differential Revision: D20746477

fbshipit-source-id: c04c2cfea14b9141d22bc3d9e9bb4c0c59925754

* Implement nativePerformanceNow to improve Profiler API results (#27885)

Summary:
When experimenting with React Profiler API (https://reactjs.org/docs/profiler.html), I noticed that durations are integers without a debugger, but they are doubles with higher precision when debugger is attached. After digging into React Profiler code, I found out that it's using `performance.now()` to accumulate execution times of individual units of work. Since this method does not exist in React Native, it falls back to Javascript `Date`, leading to imprecise results.

This PR introduces `global.nativePerformanceNow` function which returns precise native time, and a very basic `performance` polyfill with `now` function.

This will greatly improve React Profiler API results, which is essential for profiling and benchmark tools.

Solves https://github.com/facebook/react-native/issues/27274

## Changelog

[General] [Added] - Implement `nativePerformanceNow` and `performance.now()`
Pull Request resolved: https://github.com/facebook/react-native/pull/27885

Test Plan:
```
const initialTime = global.performance.now();
setTimeout(() => {
  const newTime = global.performance.now();
  console.warn('duration', newTime - initialTime);
}, 1000);
```

### Android + Hermes

![Screenshot_1580198068](https://user-images.githubusercontent.com/13116854/73245757-af0d6c80-41b5-11ea-8130-dde14ebd41a3.png)

### Android + JSC

![Screenshot_1580199089](https://user-images.githubusercontent.com/13116854/73246157-92256900-41b6-11ea-87a6-ac222383200c.png)

### iOS

![Simulator Screen Shot - iPhone 8 - 2020-01-28 at 10 06 49](https://user-images.githubusercontent.com/13116854/73245871-f136ae00-41b5-11ea-9e31-b1eff5717e62.png)

Reviewed By: ejanzer

Differential Revision: D19888289

Pulled By: rickhanlonii

fbshipit-source-id: ab8152382da9aee9b4b3c76f096e45d40f55da6c

* Save/restore IP when leaving the interpreter

Summary:
This diff implements the instruction pointer save/restore trick Tzvetan came up with; allowing us to observe and modify the IP from outside the interpreter loop with negligible overhead.

From Tzvetan's internal post on the subject:

> [Today] the interpreter IP is just a local variable in the interpreter function, so there is no way to get to its value from outside the function. It lives in a register and we don't want to make it a Runtime field since the overhead [of accessing it via memory in the interpeter loop] would kill us.

> However, if you really think about it, it only lives in a register while the interpreter function is running. For the rest of the time, it is spilled by the C++ compiler onto the stack.
So, precisely when we need it, it is actually stored in memory. The only problem is, we don't know where! Admittedly, that is an annoying problem, but it feels like it should be solvable.

> What if, instead of relying on the compiler to spill the IP register, we manually spill it ourselves, to a known location? It works. Example: https://godbolt.org/z/ftSDnp

This diff implements this approach across the whole interpreter loop: whenever we call out of the loop we capture/publish the IP and restore it again immediately after the external call returns. This means we can now see the IP outside the interpret loop and even change it. This is effectively "for free" as the compiler now skips spilling/restoring the IP behind the scenes.

The immediate benefit of this is knowing the current IP allows us to have more accurate stack-traces during execution. In future this may enabled tricks like changing the IP before returning to th…
Belle59 added a commit to Belle59/react that referenced this pull request Nov 8, 2022
….1 October 13, 2022 * [standalone] Stop highlighting events when a component is selected ([tyao1](https://github.com/tyao1) in [facebook#25448](facebook#25448))  ---  ### 4.26.0 September 16, 2022  * Show DevTools icons in Edge browser panel ([itskolli](https://github.com/itskolli) in [facebook#25257](facebook#25257)) * [Bugfix] Don't hide fragment if it has a key ([lunaruan](https://github.com/lunaruan) in [facebook#25197](facebook#25197)) * Handle info, group, and groupCollapsed in Strict Mode logging ([timneutkens](https://github.com/timneutkens) in [facebook#25172](facebook#25172)) * Highlight RN elements on hover ([tyao1](https://github.com/tyao1) in [facebook#25106](facebook#25106)) * Remove ForwardRef/Memo from display name if `displayName` is set ([eps1lon](https://github.com/eps1lon) in [facebook#21952](facebook#21952))  ---  ### 4.25.0 July 13, 2022  * Timeline Profiler Sidebar with component tree ([lunaruan](https://github.com/lunaruan) and [blakef](https://github.com/blakef) in [facebook#24816](facebook#24816), [facebook#24815](facebook#24815), [facebook#24814](facebook#24814), [facebook#24805](facebook#24805), [facebook#24776](facebook#24776)) * [DevTools][Bugfix] Fix DevTools Perf Issue When Unmounting Large React Subtrees ([lunaruan](https://github.com/lunaruan) in [facebook#24863](facebook#24863)) * Enable "reload & profile" button for timeline view ([mondaychen](https://github.com/mondaychen) in [facebook#24702](facebook#24702)) * Find best renderer when inspecting app with mutilple react roots ([mondaychen](https://github.com/mondaychen) in [facebook#24665](facebook#24665)) * Only polyfill requestAnimationFrame when necessary ([mondaychen](https://github.com/mondaychen) in [facebook#24651](facebook#24651))  ---  ### 4.24.7 May 31, 2022  * mock requestAnimationFrame with setTimeout as a temporary fix for facebook#24626 ([mondaychen](https://github.com/mondaychen) in [facebook#24633](facebook#24633)) * Fix formatWithStyles not styling the results if the first argument is an object + Added unit tests ([lunaruan](https://github.com/lunaruan) in [facebook#24554](facebook#24554))  ---  ### 4.24.6 May 12, 2022  * fix a bug in console.log with non-string args ([mondaychen](https://github.com/mondaychen) in [facebook#24546](facebook#24546)) * Add Pragma to Only Run Tests if Version Requirement Satisfied ([lunaruan](https://github.com/lunaruan) in [facebook#24533](facebook#24533)) * [DevTools][Bug] Fix Race Condition When Unmounting Fibers ([lunaruan](https://github.com/lunaruan) in [facebook#24510](facebook#24510)) * [React DevTools] Improve DevTools UI when Inspecting a user Component that Throws an Error  ([mondaychen](https://github.com/mondaychen) in [facebook#24248](facebook#24248))  ---  ### 4.24.5 May 5, 2022  * Fixed potential undefined error in `TreeContext` reducer ([bvaughn](https://github.com/bvaughn) in [facebook#24501](facebook#24501)) * Fix error where Profiler sometimes incorrectlyed reported that a `forwardRef` did not render ([lunaruan](https://github.com/lunaruan) in [facebook#24494](facebook#24494)) * Fix regex for `formateWithStyles` function ([lunaruan](https://github.com/lunaruan) in [facebook#24486](facebook#24486)) * Fixed wrong method call for LRU cache ([bvaughn](https://github.com/bvaughn) in [facebook#24477](facebook#24477)) * Synchronize implementations of second render logging ([billyjanitsch](https://github.com/billyjanitsch) in [facebook#24381](facebook#24381)) * Don't stringify objects for console log second render ([lunaruan](https://github.com/lunaruan) in [facebook#24373](facebook#24373))  ---  ### 4.24.4 April 8, 2022  * Allow react-devtools-inline `createStore()` method to override Store config params ([bvaughn](https://github.com/bvaughn) in [facebook#24303](facebook#24303)) * [ReactDebugTools] wrap uncaught error from rendering user's component ([mondaychen](https://github.com/mondaychen) in [facebook#24216](facebook#24216))  ---  ### 4.24.3 March 29, 2022  #### Bugfix * Profiler should only report stateful hooks that change between renders ([bvaughn](https://github.com/bvaughn) in [facebook#24189](facebook#24189)) * Ignore duplicate welcome "message" events ([bvaughn](https://github.com/bvaughn) in [facebook#24186](facebook#24186)) * Attach DevTools Tree keyboard events to the Tree container (not the document) ([bvaughn](https://github.com/bvaughn) in [facebook#24164](facebook#24164))  ---  ### 4.24.2 March 24, 2022  #### Bugfix * Show upgrade/downgrade instructions inline for errors thrown by the Store due to incompatible protocol (mismatched backend and frontend versions) ([bvaughn](https://github.com/bvaughn) in [facebook#24147](facebook#24147)) * Inspecting an element in a nested renderer no longer throws ([lunaruan](https://github.com/lunaruan) in [facebook#24116](facebook#24116))  ---  ### 4.24.1 March 15, 2022  #### Bugfix * Disable unsupported Bridge protocol version dialog and add workaround for old protocol operations format ([bvaughn](https://github.com/bvaughn) in [facebook#24093](facebook#24093))  ---  ### 4.24.0 March 10, 2022  #### Feature * Show DevTools backend and frontend versions in UI ([bvaughn](https://github.com/bvaughn) in [facebook#23399](facebook#23399)) * Timeline profiler refactored to support reading basic profiling data directly from React ([bvaughn](https://github.com/bvaughn) in [facebook#22529](facebook#22529))  #### Bugfix * Better handle undefined `Error` stacks in DevTools error boundary ([bvaughn](https://github.com/bvaughn) in [facebook#24065](facebook#24065)) * Fixed edge case bug in Profiler commit filtering ([bvaughn](https://github.com/bvaughn) in [facebook#24031](facebook#24031)) * Gracefully handle empty "xstyle" prop values ([lunaruan](https://github.com/lunaruan) in [facebook#23279](facebook#23279) and [bvaughn](https://github.com/bvaughn) in [facebook#23190](facebook#23190)) * Add `<TracingMarker>` component boilerplate ([lunaruan](https://github.com/lunaruan) in [facebook#23275](facebook#23275))  #### Misc * Remove object-assign polyfill ([sebmarkbage](https://github.com/sebmarkbage) in [facebook#23351](facebook#23351))  #### Breaking change * Move createRoot/hydrateRoot to react-dom/client ([sebmarkbage](https://github.com/sebmarkbage) in [facebook#23385](facebook#23385)).  Technically this is a breaking change for projects using `react-devtools-inline`, but since this package already depends on the _experimental_ release channel, we are going to include it in 4.24.  ---  ### 4.23.0 January 24, 2022  #### Feature * DevTools: Only show StrictMode badge on root elements ([bvaughn](https://github.com/bvaughn) in [facebook#23012](facebook#23012))  #### Bugfix * Don't crawl unmounted subtrees when profiling starts ([bvaughn](https://github.com/bvaughn) in [facebook#23162](facebook#23162)) * Filter deleted components from the updaters list to avoid runtime errors later ([lunaruan](https://github.com/lunaruan) in [facebook#23156](facebook#23156))  #### Misc * DevTools (not React) logs Timeline performance data to the User Timing API ([bvaughn](https://github.com/bvaughn) in [facebook#23102](facebook#23102))  ---  ### 4.22.1 December 14, 2021  * Fix invalid `require()` statements in `react-devtools-inline` ([bvaughn](https://github.com/bvaughn) in [facebook#22961](facebook#22961)) * Fix invalid `files` array in `react-devtools` `package.json` ([bvaughn](https://github.com/bvaughn) in [facebook#22960](facebook#22960))  ---  ### 4.22.0 December 13, 2021  #### A note for React Native users React DevTools has [two main pieces](https://github.com/facebook/react/blob/main/packages/react-devtools/OVERVIEW.md#overview): * The *frontend* users interact with (the Components tree, the Profiler, etc.). * The *backend* which runs in the same context as React itself. (In the web page with React DOM or shipped on the device with the React Native runtime.)  This release updates the [**protocol** that DevTools uses](https://github.com/facebook/react/blob/main/packages/react-devtools/OVERVIEW.md#serializing-the-tree) to communicate between the "frontend" and "backend" components.  Because React Native embeds a copy of the React DevTools "backend" ([`react-devtools-core/backend`](https://www.npmjs.com/package/react-devtools-core)), the "frontend" (UI) needs to match. This means you may be prompted to upgrade (or downgrade) your React DevTools based on which version of React Native your app uses.  #### Features * Support multiple DevTools instances per page ([@bvaughn](https://github.com/bvaughn) in [facebook#22949](facebook#22949)) * Advocate for StrictMode usage within Components tree ([@bvaughn](https://github.com/bvaughn) in [facebook#22886](facebook#22886)) * StyleX plug-in for resolving atomic styles to values for props.xstyle ([@bvaughn](https://github.com/bvaughn) in [facebook#22808](facebook#22808)) * Timeline search ([@bvaughn](https://github.com/bvaughn) in [facebook#22799](facebook#22799)) * Timeline: Improved snapshot view ([@bvaughn](https://github.com/bvaughn) in [facebook#22706](facebook#22706)) * Display root type for root updates in "what caused this update?" ([@eps1lon](https://github.com/eps1lon) in [facebook#22599](facebook#22599))  #### Bugfix * DevTools should inject itself for XHTML pages too (not just HTML) ([@bvaughn](https://github.com/bvaughn) in [facebook#22932](facebook#22932)) * Don't restore profiling data if we're profling ([@eps1lon](https://github.com/eps1lon) in [facebook#22753](facebook#22753)) * DevTools should properly report re-renders due to (use)context changes ([@bvaughn](https://github.com/bvaughn) in [facebook#22746](facebook#22746)) * Filter empty commits (all Fibers bailed out) from Profiler ([@bvaughn](https://github.com/bvaughn) in [facebook#22745](facebook#22745)) * Accept json file in import fileinput ([@jyash97](https://github.com/jyash97) in [facebook#22717](facebook#22717)) * Expose css vars to reach-ui portal components ([@jyash97](https://github.com/jyash97) in [facebook#22716](facebook#22716)) * Fix DevTools advanced tooltip display conditional check ([@bvaughn](https://github.com/bvaughn) in [facebook#22669](facebook#22669))  #### Misc * Emit new event when DevTools connects in standalone app ([@jstejada](https://github.com/jstejada) in [facebook#22848](facebook#22848))  ---  ### 4.21.0 October 31, 2021  #### Features * Scheduling Profiler: Add marks for component effects (mount and unmount) ([@bvaughn](https://github.com/bvaughn) in [facebook#22578](facebook#22578)) * Scheduling Profiler: De-emphasize React internal frames ([bvaughn](https://github.com/bvaughn) in [facebook#22588](facebook#22588))   #### Bugfix * Revert logic for checking for duplicate installations of DevTools potentially causing issues loading Components tab ([@jstejada](https://github.com/jstejada) in [facebook#22638](facebook#22638)) * Scheduling Profiler does not warn about long transitions ([@bvaughn](https://github.com/bvaughn) in [facebook#22614](facebook#22614)) * Re-enable 'Reload and Start Profiling' for Microsoft Edge ([@eoandersson](https://github.com/eoandersson) in [facebook#22631](facebook#22631))   #### Misc * DevTools supports ENV-injected version for better internal bug reports ([@bvaughn](https://github.com/bvaughn) in [facebook#22635](facebook#22635)) * Fix typos ([@KonstHardy](https://github.com/KonstHardy) in [facebook#22494](facebook#22494))  ---  ### 4.20.2 October 20, 2021  #### Bugfix * Dev Tools: Relax constraint on passing extensionId for backend init ([@jstejada](https://github.com/jstejada) in [facebook#22597](facebook#22597)) * DevTools: Fix passing extensionId in evaled postMessage calls ([@jstejada](https://github.com/jstejada) in [facebook#22590](facebook#22590))  ---  ### 4.20.1 October 19, 2021  #### Bugfix * Only show DevTools warning about unrecognized build in Chrome ([@jstejada](https://github.com/jstejada) in [facebook#22571](facebook#22571)) * DevTools: Include Edge in browser name detection ([@jstejada](https://github.com/jstejada) in [facebook#22584](facebook#22584))  ---  ### 4.20.0 October 15, 2021  #### Features * Allow to use the Profiler when no client is connected in standalone DevTools ([@gabrieltrompiz](https://github.com/gabrieltrompiz) in [facebook#22551](facebook#22551))  #### Bugfix * Surface backend errors during inspection in the frontend UI ([@bvaughn](https://github.com/bvaughn) in [facebook#22546](facebook#22546)) * Prevent splash page in standalone app from becoming unresponsive after the disconnection of a client  (facebook#22558) ([@gabrieltrompiz](https://github.com/gabrieltrompiz) in [facebook#22560](facebook#22560)) * Prevent errors/crashing when multiple installs of DevTools are present ([@jstejada](https://github.com/jstejada) in [facebook#22517](facebook#22517)) * Update Fiber logic in backend renderer to match implementation in React ([@jstejada](https://github.com/jstejada) in [facebook#22527](facebook#22527))  #### Misc * Show warning in UI when duplicate installations of DevTools extension are detected ([@jstejada](https://github.com/jstejada) in [facebook#22563](facebook#22563)) * Improved filenames of built worker files ([@akgupta0777](https://github.com/akgupta0777) in [facebook#22559](facebook#22559))  ---  ### 4.19.2 October 8, 2021  #### Bugfix * Show different error boundary UI for timeouts than normal errors ([bvaughn](https://github.com/bvaughn) in [facebook#22483](facebook#22483)) * Fixed bug where deleting a component filter would also close the settings modal ([Biki-das](https://github.com/Biki-das) in [facebook#22484](facebook#22484))  ---  ### 4.19.1 October 1, 2021  #### Bugfix * Fixed potential cache miss when inspecting elements ([bvaughn](https://github.com/bvaughn) in [facebook#22472](facebook#22472))  ---  ### 4.19.0 September 29, 2021  #### Features * Scheduling Profiler: Show Suspense resource .displayName ([bvaughn](https://github.com/bvaughn) in [facebook#22451](facebook#22451)) * Scheduling Profiler marks should include thrown Errors ([bvaughn](https://github.com/bvaughn) in [facebook#22419](facebook#22419)) * Don't patch console during first render in strict mode ([lunaruan](https://github.com/lunaruan) in [facebook#22308](facebook#22308)) * Show which hook indices changed when profiling for all builds ([bvaughn](https://github.com/bvaughn) in [facebook#22365](facebook#22365)) * Display actual ReactDOM API name in root type ([eps1lon](https://github.com/eps1lon) in [facebook#22363](facebook#22363)) * Add named hooks support to standalone and inline DevTools ([jstejada](https://github.com/jstejada) in [facebook#22320](facebook#22320) and [bvaughn](https://github.com/bvaughn) in [facebook#22263](facebook#22263)) #### Bugfix * DevTools encoding supports multibyte characters (e.g. "🟩") ([bvaughn](https://github.com/bvaughn) in [facebook#22424](facebook#22424)) * Improve DEV errors if string coercion throws (Temporal.*, Symbol, etc.) ([justingrant](https://github.com/justingrant) in [facebook#22064](facebook#22064)) * Fix memory leak caused by not storing alternate Fiber pointer ([bvaughn](https://github.com/bvaughn) in [facebook#22346](facebook#22346)) * Fix call stack exceeded error in `utfDecodeString()` ([bvaughn](https://github.com/bvaughn) in [facebook#22330](facebook#22330)) * Fix runtime error when inspecting an element times out ([jstejada](https://github.com/jstejada) in [facebook#22329](facebook#22329))  #### Performance * DevTools: Lazily parse indexed map sections ([bvaughn](https://github.com/bvaughn) in [facebook#22415](facebook#22415)) * DevTools: Hook names optimizations ([bvaughn](https://github.com/bvaughn) in [facebook#22403](facebook#22403)) * Replaced `network.onRequestFinished()` caching with `network.getHAR()` ([bvaughn](https://github.com/bvaughn) in [facebook#22285](facebook#22285))  ---  ### 4.18.0 September 1, 2021  #### Features * DevTools: Improve named hooks network caching ([bvaughn](https://github.com/bvaughn) in [facebook#22198](facebook#22198)) * Console Logging for StrictMode Double Rendering ([lunaruan](https://github.com/lunaruan) in [facebook#22030](facebook#22030))  ---  ### Bugfix * Fix react-devtools-inline size issues ([lunaruan](https://github.com/lunaruan) in [facebook#22232](facebook#22232)) * devtools: Don't display hook index of useContext ([eps1lon](https://github.com/eps1lon) in [facebook#22200](facebook#22200)) * Throw error in console without interfering with logs ([lunaruan](https://github.com/lunaruan) in [facebook#22175](facebook#22175))   ---  ### 4.17.0 August 24, 2021  #### Features * Scheduling Profiler: Add network measures ([bvaughn](https://github.com/bvaughn) in [facebook#22112](facebook#22112)) * Add options for disabling some features ([hbenl](https://github.com/hbenl) in [facebook#22136](facebook#22136))  #### Bugfix * Fixed broken scroll-to error or warning feature ([bvaughn](https://github.com/bvaughn) and [eps1lon](https://github.com/eps1lon) in [facebook#22147](facebook#22147) and [facebook#22144](facebook#22144)) * Replaced WeakMap with LRU for inspected element cache ([bvaughn](https://github.com/bvaughn) in [facebook#22160](facebook#22160)) * Add more detailed error handling if profiling data does not have any React marks ([byronluk](https://github.com/byronluk) in [facebook#22157](facebook#22157)) * Various named hooks bug fixes ([jstejada](https://github.com/jstejada) in [facebook#22129](facebook#22129), [facebook#22128](facebook#22128), [facebook#22096](facebook#22096), and [facebook#22148](facebook#22148)) * Fix tooltip wheel event regression ([bvaughn](https://github.com/bvaughn) in [facebook#22130](facebook#22130)) * Replace `source-map` library with `source-map-js` for named hooks source map parsing ([bvaughn](https://github.com/bvaughn) in [facebook#22126](facebook#22126))  ---  ### 4.16.0 August 16, 2021 #### Features * Scheduling Profiler: Inline snapshots ([bvaughn](https://github.com/bvaughn) in [facebook#22091](facebook#22091) and[bvaughn](https://github.com/bvaughn) in [facebook#22088](facebook#22088)) #### Bugfix * split parsing code to unblock Firefox release ([lunaruan](https://github.com/lunaruan) in [facebook#22102](facebook#22102)) * Scheduling profiler: Canvas views clip by default ([bvaughn](https://github.com/bvaughn) in [facebook#22100](facebook#22100)) * Fixed Components tree indentation bug for Chrome extension ([bvaughn](https://github.com/bvaughn) in [facebook#22083](facebook#22083))  ---  ### 4.15.0 August 11, 2021  #### Features * Added new scheduling profiler tool ([bvaughn](https://github.com/bvaughn), [kartikcho](https://github.com/kartikcho), and [taneliang](https://github.com/taneliang) in [facebook#22006](facebook#22006), [facebook#21990](facebook#21990), [facebook#22013](facebook#22013), [facebook#21897](facebook#21897), [facebook#22029](facebook#22029), [facebook#22038](facebook#22038), [facebook#22043](facebook#22043), [facebook#21947](facebook#21947), [facebook#21966](facebook#21966), [facebook#21970](facebook#21970), [facebook#21971](facebook#21971), [facebook#21975](facebook#21975)). * Parsing source code for extracting names for hooks now happens in a worker ([tsirlucas](https://github.com/tsirlucas) in [facebook#21902](facebook#21902)). * Format hyperlink text as a clickable link ([kkragoth](https://github.com/kkragoth) in [facebook#21964](facebook#21964)). * Named hooks can now be extracted from extended source maps ([jstejada](https://github.com/jstejada) [facebook#22010](facebook#22010), [facebook#22073](facebook#22073)). * Hook indices now show up as a reason why a component rendered in the profiler ([mrkev](https://github.com/mrkev) in [facebook#22073](facebook#22073)). * Optimize images in DevTools ([ilhamsyahids](https://github.com/ilhamsyahids) in [facebook#21968](facebook#21968)).  #### Bugfix * Named hooks cache is correctly cleared after Fast Refresh ([bvaughn](https://github.com/bvaughn) in [facebook#21891](facebook#21891)). * Hook names are correctly extracted when parsing nested hook calls ([jstejada](https://github.com/jstejada) in [facebook#22037](facebook#22037), [facebook#21996](facebook#21996)). * Highlight updates with memoized components ([Selnapenek](https://github.com/Selnapenek) in [facebook#22008](facebook#22008)). * Set app icon on MacOS ([christian-schulze](https://github.com/christian-schulze) in [facebook#21908](facebook#21908)). * Updated @reach packages to fix unmount bug ([bvaughn](https://github.com/bvaughn) in [facebook#22075](facebook#22075)).  #### Misc * Refactor imperative theme code ([houssemchebeb](https://github.com/houssemchebeb) in [facebook#21950](facebook#21950)). * Change some remaining instances of master -> main ([shubham9411](https://github.com/shubham9411) in [facebook#21982](facebook#21982)).  ##### Scheduling profiler  ###### What is React working on?  React’s previous Profiler primarily reports how fast (or slow) components are when rendering. It didn’t provide an overview of *what React is doing* (the actual cooperative scheduling bits). The new profiler does. It shows when components schedule state updates and when React works on them. It also shows how React categorizes and prioritizing what it works on.  Here’s a profile for a simple app that uses only the legacy (synchronous) `ReactDOM.render` API. The profiler shows that all of the work scheduled and rendered by this app is done at *synchronous* priority:  https://user-images.githubusercontent.com/29597/129042321-56985f5a-264e-4f3a-a8b7-9371d75c690f.mp4  Here’s a more interesting profile for an app that’s rendered at _default_ priority using the new [`createRoot` API](reactwg/react-18#5), then updates _synchronously_ in response to an “input” event to manage a ["controlled component"](https://reactjs.org/docs/forms.html#controlled-components):  https://user-images.githubusercontent.com/29597/129074959-50912a63-0215-4be5-b51b-1e0004fcd2a1.mp4  Here’s part of a profile showing an idle app (no JavaScript running). In this case, React does some pre-rendering work for components that are “offscreen” (not currently displayed).  https://user-images.githubusercontent.com/29597/128971757-612f232f-c64f-4447-a766-66a0516e8f49.mp4  Note that “offscreen” refers to a new API and set of features that we haven’t talked about much yet except for [some passing references](reactwg/react-18#18 (reply in thread)). We’ll talk more about it in future posts.  ###### What are “transitions” and how do they work? We recently shared an update about the new [`startTransition` API](reactwg/react-18#41). This API helps apps feel responsive even when there are large updates by splitting the work into (1) a quick update to show that the app has received some input and (2) a slower update (the “transition”) that actually does any heavy lifting needed as a result of the input.  Here is an example profile that uses the transition API. First React renders a small update that shows the user some visual feedback (like updating a controlled component or showing an inline loading indicator). Then it renders a larger update that, in this case, computes some expensive value.  https://user-images.githubusercontent.com/29597/129079176-0995c8c0-e95a-4f44-8d55-891a7efa35c0.mp4  ###### How does Suspense impact rendering performance?  You may have heard mention of “suspense” in past talks or seen it referenced [in our docs](https://reactjs.org/docs/react-api.html#suspense). Although full support for data fetching via Suspense is [expected to be released sometime after React 18.0](reactwg/react-18#47 (comment)), you can use Suspense today for things like lazy-loading React components. The new profiler shows when components suspend during render and how that impacts overall rendering performance.  Here’s an example profile that suspends during the initial render to lazy-load a component using [`React.lazy`](https://reactjs.org/docs/code-splitting.html#reactlazy). While this component is loading, React shows a “fallback“ (placeholder UI). Once the component finishes loading, React retries the render and commits the final UI.  https://user-images.githubusercontent.com/29597/129054366-2700e7e8-0172-4f61-9453-475acd740456.mp4  We plan to expand support for Suspense in the coming weeks to more explicitly show when suspense fallbacks are rendered and which subsequent renders are related to an initial update that suspended.  ###### What else might cause a render to get delayed?  Suspense can cause a render to get delayed as React waits for data to load, but React can also get stuck waiting on a lot of JavaScript to run.  React profiling tools have previously focused on only reporting what React (or React components) are doing, but any JavaScript the browser runs affects performance. The new profiler shows non-React JavaScript as well, making it easy to see when it delays React from rendering.  https://user-images.githubusercontent.com/29597/128971952-7c4e7e11-f4fb-497e-b643-4d9b3994b590.mp4  ###### What can you do to improve performance?  Until now, DevTools (and the Profiler) has provided information without commentary. The new profiler takes a more active approach– highlighting where we think performance can be improved and providing suggestions.  For example, suspending during an update is generally a bad user experience because it causes previously shown components to be unmounted (hidden) so the fallback can be shown while data loads. This can be avoided using the new [Transition API](reactwg/react-18#41). If you forget to add a transition to an update that suspends, the new profiler will warn you about this:  https://user-images.githubusercontent.com/29597/128972228-3b23f01a-8017-43ad-b371-975ffed26c06.mp4  The new profiler also warns about scheduling a long, synchronous React update inside of event handler.  https://user-images.githubusercontent.com/29597/128972000-d7477ba3-b779-46f2-b141-aaa712e9d6d2.mp4  Another thing the new profiler will warn about is long-running renders scheduled from layout effects (`useLayoutEffect` or `componentDidMount`/`componentDidUpdate`). These updates (called “nested updates”) are sometimes necessary to adjust layout before the browser paints, but they should be *fast*. Slow nested updates make the browser feel unresponsive.  https://user-images.githubusercontent.com/29597/128972017-3ed0e682-751c-46fb-a6c5-271f255c8087.mp4  ---  ### 4.14.0 July 17, 2021 #### Features * Display hook names for inspected components ([saphal1998](https://github.com/saphal1998), [VibhorCodecianGupta](https://github.com/VibhorCodecianGupta), [bvaughn](https://github.com/bvaughn), and [motiz88](https://github.com/motiz88) in [facebook#21641](facebook#21641), [facebook#21790](facebook#21790), [facebook#21814](facebook#21814), [facebook#21815](facebook#21815), [facebook#21831](facebook#21831), [facebook#21833](facebook#21833), [facebook#21835](facebook#21835), [facebook#21865](facebook#21865), [facebook#21871](facebook#21871), [facebook#21874](facebook#21874), [facebook#21891](facebook#21891)) * Control for manually toggling error boundaries ([baopham](https://github.com/baopham) in [facebook#21583](facebook#21583)) * Allow user to manually enter Profiler commit number to jump between commits ([srubin](https://github.com/srubin) in [facebook#19957](facebook#19957))  ##### Display hook names for inspected components ![DevTools parsing hook names](https://user-images.githubusercontent.com/29597/124013541-68c2cb00-d9b0-11eb-83ab-81a5180da46b.gif)  ##### Control for manually toggling error boundaries ![DevTools error boundary toggle](https://user-images.githubusercontent.com/29597/125891522-30f0d99d-407f-4c31-b5a7-e9d0bd3fa554.gif)  ---  ### 4.13.5 May 25, 2021 #### Bugfix * Handle edge case where a component mounts before its "owner" (in DEV mode) that previously caused a validation error ([bvaughn](https://github.com/bvaughn) in [facebook#21562](facebook#21562))  ---  ### 4.13.4 May 20, 2021 #### Bugfix * Fix edge-case Fast Refresh bug that caused Fibers with warnings/errors to be untracked prematurely (which broke componentinspection in DevTools) ([bvaughn](https://github.com/bvaughn) in [facebook#21536](facebook#21536)) * Revert force deep re-mount when Fast Refresh detected (was no longer necessary) ([bvaughn](https://github.com/bvaughn) in [facebook#21539](facebook#21539))  ---  ### 4.13.3 May 19, 2021 #### Misc * Updated `react` and `react-dom` API imports in preparation for upcoming stable release ([bvaughn](https://github.com/bvaughn) in [facebook#21488](facebook#21488))  #### Bugfix * Reload all roots after Fast Refresh force-remount (to avoid corrupted Store state) ([bvaughn](https://github.com/bvaughn) in [facebook#21516](facebook#21516) and [facebook#21523](facebook#21523)) * Errors thrown by Store can be dismissed so DevTools remain usable in many cases ([bvaughn](https://github.com/bvaughn) in [facebook#21520](facebook#21520)) * Bugfix for `useState()` object with `hasOwnProperty` key ([bvaughn](https://github.com/bvaughn) in [facebook#21524](facebook#21524)) * Fixed string concatenation problem when a `Symbol` was logged to `console.error` or `console.warn` ([bvaughn](https://github.com/bvaughn) in [facebook#21521](facebook#21521)) * DevTools: Fixed version range NPM syntax  ([bvaughn](https://github.com/bvaughn) in [9cf1069](facebook@9cf1069#diff)) * Tweaked DevTools error template title to match issue form template ([bvaughn](https://github.com/bvaughn) in [1a2d792](facebook@1a2d792))  ---  ### 4.13.2 May 7, 2021 #### Misc * Improved bug report template to use new [GitHub issue forms](https://gh-community.github.io/issue-template-feedback/structured/) ([bvaughn](https://github.com/bvaughn) in [facebook#21450](facebook#21450))  ---  ### 4.13.1 April 28, 2021 #### Bugfix * Improve display name logic for `React.memo` components ([bvaughn](https://github.com/bvaughn) in [facebook#21392](facebook#21392)) * Fixed potential runtime error with Suspense in versions <= 17 ([bvaughn](https://github.com/bvaughn) in [facebook#21432](facebook#21432)) * Errors thrown in the Store are no longer silent ([bvaughn](https://github.com/bvaughn) in [facebook#21426](facebook#21426))  #### Misc * Improved bug report template ([bvaughn](https://github.com/bvaughn) in [facebook#21413](facebook#21413)), [facebook#21421](facebook#21421))  ---  ### 4.13.0 April 28, 2021 #### Features * Add Bridge protocol version backend/frontend ([bvaughn](https://github.com/bvaughn) in [facebook#21331](facebook#21331))  #### Bugfix * DevTools iterates over siblings during mount (rather than recursing) to avoid stack overflow errors ([bvaughn](https://github.com/bvaughn) in [facebook#21377](facebook#21377)) * Multiple error dialogs can be visible at once ([bvaughn](https://github.com/bvaughn) in [facebook#21370](facebook#21370)) * Console patching should handle Symbols without erroring ([bvaughn](https://github.com/bvaughn) in [facebook#21368](facebook#21368))  ###### Bridge protocol version backend/frontend During initialization, DevTools now checks to ensure it's compatible with the ["backend"](https://github.com/facebook/react/blob/main/packages/react-devtools/OVERVIEW.md#overview) that's embedded within a renderer like React Native. If the two aren't compatible, upgrade instructions will be shown:  <img width="400" height="233" alt="Dialog displaying downgrade instructions for the React DevTools frontend to connect to an older backend version" src="https://user-images.githubusercontent.com/29597/115997927-f77f2a00-a5b2-11eb-9098-20042b664cea.png">      <img width="400" height="233" alt="Dialog displaying upgrade instructions for the React DevTools frontend to connect to a newer backend version" src="https://user-images.githubusercontent.com/29597/115997965-167dbc00-a5b3-11eb-9cbc-082c65077a6e.png">  Learn more about this change at [fb.me/devtools-unsupported-bridge-protocol](https://fb.me/devtools-unsupported-bridge-protocol)  ---  ### 4.12.4 April 19, 2021 #### Bugfix * Remove `@octokit/rest` dependency because of a problem with transitive dependencies ([bvaughn](https://github.com/bvaughn) in [facebook#21317](facebook#21317))  ---  ### 4.12.3 April 19, 2021 #### Bugfix * Wrapped quotation marks around Fiber ids or indices for all DevTools errors to better support GitHub fuzzy error search ([bvaughn](https://github.com/bvaughn) in [facebook#21314](facebook#21314))  ---  ### 4.12.2 April 16, 2021 #### Bugfix * DevTools reliably suppresses console logs when generating component stacks ([bvaughn](https://github.com/bvaughn) in [facebook#21301](facebook#21301))  ---  ### 4.12.1 April 14, 2021 Although this release is being made for all NPM packages, only the `react-devtools-inline` package contains changes. #### Bugfix * Fixed `react-devtools-inline` bug in frontend `initialize` method ([bvaughn](https://github.com/bvaughn) in [facebook#21265](facebook#21265))  ---  ### 4.12.0 April 12, 2021 Although this release is being made for all NPM packages, only the `react-devtools-inline` package contains changes. #### Features * Added `createBridge` and `createStore` exports to the `react-devtools-inline/frontend` entrypoint to support advanced use cases ([bvaughn](https://github.com/bvaughn) in [facebook#21032](facebook#21032))  ---  ### 4.11.1 April 11, 2021 #### Bugfix * Fixed broken import in `react-devtools-inline` for feature flags file ([bvaughn](https://github.com/bvaughn) in [facebook#21237](facebook#21237))  ---  ### 4.11.0 April 9, 2021 #### Bugfix * `$r` should contain hooks property when it is `forwardRef` or `memo` component  ([meowtec](https://github.com/meowtec) in [facebook#20626](facebook#20626)) * Ensure `sync-xhr` is allowed before reload and profile ([ChrisDobby](https://github.com/ChrisDobby) in [facebook#20879](facebook#20879)) * Bump electron version from 9.1.0 to 11.1.0 for darwin-arm64 builds ([jaiwanth-v](https://github.com/jaiwanth-v) in [facebook#20496](facebook#20496)) * Fixed primitive hook badge colors for light theme ([bvaughn](https://github.com/bvaughn) in [facebook#21034](facebook#21034)) * Increased minimum Chrome/Firefox versions from 51/54 to 60/55 to reduce polyfill code. ([bvaughn](https://github.com/bvaughn) in [facebook#21185](facebook#21185)) * Fix can't expand prop value in some scenario ([iChenLei](https://github.com/iChenLei) in [facebook#20534](facebook#20534)) * Flush updated passive warning/error info after delay ([bvaughn](https://github.com/bvaughn) in [facebook#20931](facebook#20931)) * Patch console methods even when only show-inline-warnings/errors enabled ([bvaughn](https://github.com/bvaughn) in [facebook#20688](facebook#20688)) * React Native fixes for new inline errors feature ([bvaughn](https://github.com/bvaughn) in [facebook#20502](facebook#20502)) * Fixed invalid work tag constants that affected a certain range of React versions ([bvaughn](https://github.com/bvaughn) in [facebook#20362](facebook#20362))  #### Features * Improve Profiler commit-selector UX ([bvaughn](https://github.com/bvaughn) in [facebook#20943](facebook#20943)) * Swap `log` with `cbrt` for commit bar height ([bvaughn](https://github.com/bvaughn) in [facebook#20952](facebook#20952)) * Integrate with new experimental React Suspense features to improve props loading and inspection UX ([bvaughn](https://github.com/bvaughn) in [facebook#20548](facebook#20548), [facebook#20789](facebook#20789), [facebook#20458](facebook#20458)) * Expose DEV-mode warnings in devtools UI ([eps1lon](https://github.com/eps1lon) in [facebook#20463](facebook#20463)) * Display shortcuts for prev/next search result ([eps1lon](https://github.com/eps1lon) in [facebook#20470](facebook#20470)) * Increase the clickable area of the prop value ([TryingToImprove](https://github.com/TryingToImprove) in [facebook#20428](facebook#20428))  #### Experimental features The following features are only enabled when used with (experimental) builds of React: * Shows which fibers scheduled the current update ([bvaughn](https://github.com/bvaughn) in [facebook#21171](facebook#21171)) * Add commit and post-commit durations to Profiler UI ([bvaughn](https://github.com/bvaughn) in [facebook#20984](facebook#20984), [facebook#21183](facebook#21183)) * Show which hooks (indices) changed when profiling ([bvaughn](https://github.com/bvaughn) in [facebook#20998](facebook#20998))  ###### Improve Profiler commit-selector UX  ![Video demonstrating tooltip with commit duration and time](https://user-images.githubusercontent.com/29597/110225725-30a1f480-7eb6-11eb-9825-4c762ffde0bb.gif)  ![Graphic illustrating Profiler bar heights using different scales](https://user-images.githubusercontent.com/29597/110361997-bafd6c00-800e-11eb-92d8-d411e6c79d84.png)  ###### Expose DEV-mode warnings in devtools UI ![Inline warnings and errors](https://user-images.githubusercontent.com/29597/114225729-adeed800-9940-11eb-8df2-34d8b0ead3b8.png)  ###### Shows which fibers scheduled the current update ![Shows which fibers scheduled the current update](https://user-images.githubusercontent.com/29597/114225931-eee6ec80-9940-11eb-90cc-fe6630fbfc08.gif)  ###### Add commit and post-commit durations to Profiler UI ![Add commit and post-commit durations to Profiler UI](https://user-images.githubusercontent.com/29597/114225991-00c88f80-9941-11eb-84df-e2af04ecef1c.gif)  ###### Show which hooks (indices) changed when profiling ![Show which hooks (indices) changed when profiling](https://user-images.githubusercontent.com/29597/114225838-d37be180-9940-11eb-93f8-93e0115421c8.png)  ---  ### 4.10.4 May 20, 2021 #### Bugfix * Ported passive effects sync flushing/bubbling bugfix ([bvaughn](https://github.com/bvaughn) in [facebook#21540](facebook#21540))  ---  ### 4.10.3 April 27, 2021 #### Bugfix * Replaced Facebook-internal fburl.com link with public fb.me link for Bridge protocol mismatch info page ([bvaughn](https://github.com/bvaughn) in [facebook#21344](facebook#21344))  ---  ### 4.10.2 April 27, 2021 #### Features * Added Bridge protocol check and warning dialog if embedded DevTools backend is incompatible with DevTools UI ([bvaughn](https://github.com/bvaughn) in [facebook#21344](facebook#21344))  ---  ### 4.10.1 November 12, 2020 #### Bugfix * Fixed invalid internal work tag mappings ([bvaughn](https://github.com/bvaughn) in [facebook#20362](facebook#20362))  ---  ### 4.10.0 November 12, 2020 #### Features * Make DevTools Websocket retry delay configurable ([bvaughn](https://github.com/bvaughn) in [facebook#20107](facebook#20107)) #### Bugfix * Fix error loading source maps for devtools extension ([sytranvn](https://github.com/sytranvn) in [facebook#20079](facebook#20079)) * Remove css-sourcemap for `react-devtools-inline` ([sean9keenan](https://github.com/sean9keenan) in [facebook#20170](facebook#20170)) * Decrease NPM update notification/prompt for standalone DevTools ([recurx](https://github.com/recurx) in [facebook#20078](facebook#20078))  ---  ### 4.9.0 October 19, 2020 #### Features * [Improved DevTools editing interface](#improved-devtools-editing-interface) ([bvaughn](https://github.com/bvaughn) in [facebook#19774](facebook#19774)) * Add ⎇ + arrow key navigation ([bvaughn](https://github.com/bvaughn) in [facebook#19741](facebook#19741)) * Add checkbox toggle for boolean values ([mdaj06](https://github.com/mdaj06) in [facebook#19714](facebook#19714)) * Show symbols used as keys in state ([omarsy](https://github.com/omarsy) in [facebook#19786](facebook#19786)) * Add new (unstable) `SuspenseList` component type ([bpernick](https://github.com/bpernick) in [facebook#19684](facebook#19684))  #### Bugfix * Show proper icon/tooltip for restricted browser pages ([sktguha](https://github.com/sktguha) in [facebook#20023](facebook#20023)) * Fix emoji character shown in Chrome developer tools panel ([bvaughn](https://github.com/bvaughn) in [facebook#19603](facebook#19603)) * Don't open two tabs in Firefox when clicking on troubleshooting instructions ([unbyte](https://github.com/unbyte) in [facebook#19632](facebook#19632)) * Support inner component `_debugOwner` in memo ([bvaughn](https://github.com/bvaughn) in [facebook#19556](facebook#19556)) * Proxied methods should be safely dehydrated for display ([@pfongkye](https://github.com/pfongkye) in [b6e1d08](facebook@b6e1d08) * Property list values should show whitespace ([sammarks](https://github.com/sammarks) in [facebook#19640](facebook#19640)) * Fix crash when inspecting document.all ([omarsy](https://github.com/omarsy) in [facebook#19619](facebook#19619)) * Don't call generators during inspection since they may be stateful ([todortotev](https://github.com/todortotev) in [facebook#19831](facebook#19831)) * Fix bad null check in DevTools highlight code ([bvaughn](https://github.com/bvaughn) in [facebook#20010](facebook#20010)) * Handled a missing suspense fiber when suspense is filtered on the profiler ([IDrissAitHafid](https://github.com/IDrissAitHafid) in [#ISSUE](https://github.com/facebook/react/pull/ISSUE)) * Fixed unfound node error when Suspense is filtered ([IDrissAitHafid](https://github.com/IDrissAitHafid) in [facebook#20019](facebook#20019)) * Always overrides the dispatcher when shallow rendering ([bvaughn](https://github.com/bvaughn) in [facebook#20011](facebook#20011)) * Frevent phishing attacks ([iamwilson](https://github.com/iamwilson) in [facebook#19934](facebook#19934))  ---  ### Other * Enable source maps for DevTools production builds ([jpribyl ](https://github.com/jpribyl ) in [facebook#19773](facebook#19773)) * Drop support for IE 11 ([bvaughn](https://github.com/bvaughn) in [facebook#19875](facebook#19875)) * Remove ReactJS.org version check "cheat" ([sktguha](https://github.com/sktguha) in [facebook#19939](facebook#19939)) * Update outdated links and fix two broken links ([sktguha](https://github.com/sktguha) in [facebook#19985](facebook#19985)) * Remove support for deprecated/unreleased React Flare event system ([trueadm](https://github.com/trueadm) in [facebook#19520](facebook#19520))  ###### Improved DevTools editing interface  **Improved parsing** Value parsing logic has been relaxed so as to no longer require quotes around strings or double quotes: ![looser parsing logic](https://user-images.githubusercontent.com/29597/93407442-36504300-f860-11ea-90e8-5ad54c9b8b34.gif)  **Modifying arrays** New values can be added to array props/state/hooks now. Existing values can also be deleted: ![adding and removing values from an array](https://user-images.githubusercontent.com/29597/93407457-3ea87e00-f860-11ea-8b85-a41904e6c25f.gif)  **Modifying objects** New keys can be added to object props/state/hooks now. Existing keys can be renamed or deleted entirely: ![adding/renaming/removing object properties](https://user-images.githubusercontent.com/29597/93407464-449e5f00-f860-11ea-909b-49dafb56f6c5.gif)  ---  ### 4.8.2 July 15, 2020 #### Bugfix * Fix broken `Suspense` heuristic ([bvaughn](https://github.com/bvaughn) in [facebook#19373](facebook#19373)) * Fixed error with standalone in HTTPS mode ([b-ponomarenko](https://github.com/b-ponomarenko) in [facebook#19336](facebook#19336)) * Disable DevTools minification ([bvaughn](https://github.com/bvaughn) in [facebook#19369](facebook#19369))  ---  ### 4.8.1 July 10, 2020 #### Bugfix * Fix break-on-warning to truly be off by default. ([gaearon](https://github.com/gaearon) in [facebook#19309](facebook#19309))  ---  ### 4.8.0 July 9, 2020 #### Features * Add SSL support to React devtools standalone ([ittaibaratz](https://github.com/ittaibaratz) in [facebook#19191](facebook#19191)) * New break-on-warning feature (off by default) ([bvaughn](https://github.com/bvaughn) in [facebook#19048](facebook#19048))  #### Bugfix * Updates Electron version for react-devtools to pull in several security fixes ([gsimone](https://github.com/gsimone) in [facebook#19280](facebook#19280)) * Remove unnecessary tag end from CommitRanked view ([finico](https://github.com/finico) in [facebook#19195](facebook#19195)) * Shutdown DevTools Bridge synchronously when unmounting ([bvaughn](https://github.com/bvaughn) in [facebook#19180](facebook#19180))  ---  ### 4.7.0 May 18, 2020  #### Features * Improved appended component stacks for third party warnings to be more like native ([bvaughn](https://github.com/bvaughn) in [facebook#18656](facebook#18656)) * Improve inline search results by highlighting match on HOC badge ([bl00mber](https://github.com/bl00mber) in [facebook#18802](facebook#18802)) * Add key badge to inspected element in right hand pane ([karlhorky]](https://github.com/karlhorky) in [facebook#18737](facebook#18737)) * Improve Profiler snapshot selector drag-and-drop UX ([bl00mber](https://github.com/bl00mber) in [facebook#18852](facebook#18852)) * Profiler tooltip now includes self duration to make it easier to scan times without requiring selection ([bvaughn](https://github.com/bvaughn) in [facebook#18510](facebook#18510)) * Rendered by list also now highlights native elements on hover ([hristo-kanchev](https://github.com/hristo-kanchev) in [facebook#18479](facebook#18479)) * Add in-page highlighting for mouse-over interactions in Profiler ([bl00mber](https://github.com/bl00mber) in [facebook#18745](facebook#18745))  #### Bugfix * Fix Profiler bug "_Could not find commit data for root_" by resetting selected node on root change ([bl00mber](https://github.com/bl00mber) in [facebook#18880](facebook#18880)) * Add `imported` flag to Profiling data to more reliably differentiate between imported and session data ([bl00mber](https://github.com/bl00mber) in [facebook#18913](facebook#18913)) * Disable Profiler filtering to avoid edge case runtime error "_Cannot read property 'duration' of undefined_" ([bvaughn](https://github.com/bvaughn) in [facebook#18862](facebook#18862)) * Fix Profiler bug "_cannot read property 'memoizedState' of null_" ([bvaughn](https://github.com/bvaughn) in [facebook#18522](facebook#18522)) * Whitespace search results highlighting bug fix ([bvaughn](https://github.com/bvaughn) in [facebook#18527](facebook#18527)) * Improved confusing Profiler tooltip text for components that did not render ([bvaughn](https://github.com/bvaughn) in [facebook#18523](facebook#18523)) * Fix edge case performance issue when highlight elements enabled ([Faelivrinx](https://github.com/Faelivrinx) in [facebook#18498](facebook#18498)) * Disabled Webpack auto polyfill for `setImmediate` ([bvaughn](https://github.com/bvaughn) in [facebook#18860](facebook#18860)) * Fix mouse interactions for standalone DevTools on Linux ([bl00mber](https://github.com/bl00mber) in [facebook#18772](facebook#18772))  ---  ### 4.6.0 March 26, 2020  #### Features * Add shortcut keys for tab switching ([kerolloz](https://github.com/kerolloz) in [facebook#18248](facebook#18248))  #### Bugfix * Improve display of complex values for `useDebugValue` ([eps1lon](https://github.com/eps1lon) in [facebook#18070](facebook#18070)) * Fix minor CSS layout issue that broke Profiler commit selector UI ([bvaughn](https://github.com/bvaughn) in [facebook#18286](facebook#18286)) * Inlined DevTools event emitter implementation to fix a source of Profiler bugs ([bvaughn](https://github.com/bvaughn) in [facebook#18378](facebook#18378))  #### Cleanup * Remove "es6-symbol" dependency from "react-devtools-inline" package ([bvaughn](https://github.com/bvaughn) in [facebook#18397](facebook#18397))  ---  ### 4.5.0 March 3, 2020  #### Features * Improve function props display for inspected elements ([bvaughn](https://github.com/bvaughn) in [facebook#17789](facebook#17789)) * Re-enabled context menu for Firefox extension ([bvaughn](https://github.com/bvaughn) in [facebook#17838](facebook#17838)) * Apply changes to props/state/hooks on blur (rather than on ENTER) ([muratcatal](https://github.com/muratcatal) in [facebook#17062](facebook#17062)) * Add info tooltip to nodes in Profiler ([M-Izadmehr](https://github.com/M-Izadmehr) in [facebook#18048](facebook#18048)) * Added resize support to Components panel ([hristo-kanchev](https://github.com/hristo-kanchev) in [facebook#18046](facebook#18046))  #### Bugfix * Improve how empty commits are filtered ([nutboltu](https://github.com/nutboltu) in [facebook#17931](facebook#17931)) * BigInt serialize issue in devtools copy to clipboard ([bvaughn](https://github.com/bvaughn) in [facebook#17771](facebook#17771)) * Renamed "backend.js" to "react_devtools_backend.js" to reduce potential confusion from profiling ([bvaughn](https://github.com/bvaughn) in [facebook#17790](facebook#17790)) * Update root styles to prevent `box-sizing` style from leaking outside of inline target ([GasimGasimzada](https://github.com/GasimGasimzada) in [facebook#17775](facebook#17775)) * Fix "_Cannot read property 'sub' of undefined_" error when navigating to plain-text pages ([wfnuser](https://github.com/wfnuser) in [facebook#17848](facebook#17848)) * Fix potential error with composite hooks during shallow re-rendering ([bvaughn](https://github.com/bvaughn) in [facebook#18130](facebook#18130)) * Scope dev tools wildcard styles within DevTools CSS class ([@GasimGasimzada](https://github.com/GasimGasimzada) in [9cc094a](facebook@9cc094a#diff-ab5ee5655b2aac3260e1f836546a13c9))  ###### Info summary tooltips  ![Profiler tooltips in Flamegraph chart](https://user-images.githubusercontent.com/28848972/74614074-09468100-5115-11ea-8c87-c224d229ef15.gif)  ![Profiler tooltips in Ranked chart](https://user-images.githubusercontent.com/28848972/74614072-08155400-5115-11ea-8d19-7ab3d27b9b0a.gif)  ###### Components panel resize  ![Horizontal Components panel resizing](https://user-images.githubusercontent.com/23095052/74603147-ca7edf80-50b0-11ea-887f-db7ada855c50.gif)  ![Vertical Components panel resizing](https://user-images.githubusercontent.com/23095052/74603149-d074c080-50b0-11ea-820f-63db30b4c285.gif)  ---  ### 4.4.0 January 3, 2020 #### Features * Re-enabled "copy" prop/state/hooks context menu option for Firefox ([bvaughn](https://github.com/bvaughn),[rpl](https://github.com/rpl) in [facebook#17740](facebook#17740)) * Shift+Enter focuses previous search result in Components tree ([Bo-Duke](https://github.com/Bo-Duke) in [facebook#17005](facebook#17005)) * Properly display formatted `RegExp` values in props/state panel([bvaughn](https://github.com/bvaughn) in [facebook#17690](facebook#17690)) * Profiler commit selector wraps around for easier navigation of large profiles ([bvaughn](https://github.com/bvaughn) in [facebook#17760](facebook#17760)) #### Bugfix * Check `document.contentType` before injecting hook to avoid breaking XML file syntax highlighting in Firefox ([bvaughn](https://github.com/bvaughn) in [facebook#17739](facebook#17739)) * Fix standalone UI not responding to mouse interactions due to `webkit-app-region` style ([cwatson88](https://github.com/cwatson88) in [facebook#17584](facebook#17584)) * Support inspecting object values with null protos ([bvaughn](https://github.com/bvaughn) in [facebook#17757](facebook#17757)) * Support inspecting values that have overridden `hasOwnProperty` attribute ([bvaughn](https://github.com/bvaughn) in [facebook#17768](facebook#17768)) * Fixed regression that made Profiler "Could not find node…" error happen more frequently ([bvaughn](https://github.com/bvaughn) in [facebook#17759](facebook#17759))  ---  ### 4.3.0 December 20, 2019 #### Features * Show component location for selected element in bottom/right panel ([bvaughn](https://github.com/bvaughn) in [facebook#17567](facebook#17567)) * Improved inspected element values with inline previews ([bvaughn](https://github.com/bvaughn) in [facebook#17579](facebook#17579)) * Improved selection and toggling for inspected element panel ([bvaughn](https://github.com/bvaughn) in [facebook#17588](facebook#17588)) * Copy context menu for inspecting and copying props/state/hooks/context values ([bvaughn](https://github.com/bvaughn) in [facebook#17608](facebook#17608)) #### Bug fixes * Fix serialization for `BigInt` type so that it does not break inspection panel. ([nutboltu](https://github.com/nutboltu) in [facebook#17233](facebook#17233)) * Fix display name logic for `forwardRef`s that use `displayName` property ([zthxxx](https://github.com/zthxxx) in [facebook#17613](facebook#17613))  ---  ### 4.2.1 November 27, 2019 #### Bug fixes * Profiler automatically filters certain types of empty (no work) commits. ([bvaughn](https://github.com/bvaughn) in [facebook#17253](facebook#17253)) * Fix memoized components showing as "Anonymous" in Components tab. ([wsmd](https://github.com/wsmd) in [facebook#17274](facebook#17274)) * Edge-case bugfix for non-string element keys. ([bvaughn](https://github.com/bvaughn) in [facebook#17164](facebook#17164))  ---  ### 4.2.0 October 3, 2019 #### Features * "Highlight updates" feature added for browser extensions and `react-devtools-inline` NPM package. ([bvaughn](https://github.com/bvaughn) in [facebook#16989](facebook#16989))  ---  ### 4.1.3 September 30, 2019 #### Bug fixes * Fixed regression where DevTools wouldn't properly connect with apps when using the `file://` protocol. ([linshunghuang](https://github.com/linshunghuang) in [facebook#16953](facebook#16953))  ---  ### 4.1.2 September 27, 2019 #### Bug fixes * Fixed an infinite loop that occurred in some cases with prop values of `NaN`. ([bvaughn](https://github.com/bvaughn) in [facebook#16934](facebook#16934))  ---  ### 4.1.1 September 26, 2019 #### Bug fixes * Fixed bug where Components panel was always empty for certain users. ([linshunghuang](https://github.com/linshunghuang) in [facebook#16900](facebook#16900)) * Fixed regression in DevTools editable hooks interface that caused primitive values to be shown as `undefined`. ([bvaughn](https://github.com/bvaughn) in [facebook#16867](facebook#16867)) * Fixed bug where DevTools showed stale values in props/state/hooks editing interface. ([bvaughn](https://github.com/bvaughn) in [facebook#16878](facebook#16878)) * Show unsupported version dialog with downgrade instructions. ([bvaughn](https://github.com/bvaughn) in [facebook#16897](facebook#16897))  ---  ### 4.1.0 September 19, 2019 #### Features * Props/state editor supports adding new values and changing value types. ([hristo-kanchev](https://github.com/hristo-kanchev) in [facebook#16700](facebook#16700)) #### Bug fixes * Profiler correctly saves/exports profiling data in Firefox now. ([hristo-kanchev](https://github.com/hristo-kanchev) in [facebook#16612](facebook#16612)) * Class components now show "legacy context" header (rather than "context") for legacy API. ([hristo-kanchev](https://github.com/hristo-kanchev) in [facebook#16617](facebook#16617)) * Show component source button ("<>") now highlights the `render` method for class components. ([theKashey](https://github.com/theKashey) in [facebook#16759](facebook#16759)) * Bugfix for components with non-standard object values for `function.name`. ([LetItRock](https://github.com/LetItRock) in [facebook#16798](facebook#16798))  ---  ### 4.0.6 August 26, 2019 #### Bug fixes * Remove ⚛️ emoji prefix from Firefox extension tab labels * Standalone polyfills `Symbol` usage  ---  ### 4.0.5 August 19, 2019 #### Bug fixes * Props, state, and context values are alpha sorted. * Standalone DevTools properly serves backend script over localhost:8097  ---  ### 4.0.4 August 18, 2019 #### Bug fixes * Bugfix for potential error if a min-duration commit filter is applied after selecting a fiber in the Profiler UI.  ---  ### 4.0.3 August 17, 2019 #### Bug fixes * ES6 `Map` and `Set`, typed arrays, and other unserializable types (e.g. Immutable JS) can now be inspected. * Empty objects and arrays now display an "(empty)" label to the right to reduce confusion. * Components that use only the `useContext` hook now properly display hooks values in side panel. * Style editor now supports single quotes around string values (e.g. both `"red"` and `'red'`). * Fixed edge case bug that prevented profiling when both React v16 and v15 were present on a page.  ---  ### 4.0.2 August 15, 2019 #### Permissions cleanup * Removed unnecessary `webNavigation ` permission from Chrome and Firefox extensions.  ---  ### 4.0.1 August 15, 2019 #### Permissions cleanup * Removed unnecessary `<all_urls>`, `background`, and `tabs` permissions from Chrome and Firefox extensions.  ---  ### 4.0.0 August 15, 2019  ---  ### General changes  #### Improved performance The legacy DevTools extension used to add significant performance overhead, making it unusable for some larger React applications. That overhead has been effectively eliminated in version 4.  [Learn more](https://github.com/facebook/react/blob/main/packages/react-devtools/OVERVIEW.md) about the performance optimizations that made this possible.  #### Component stacks  React component authors have often requested a way to log warnings that include the React ["component stack"](https://reactjs.org/docs/error-boundaries.html#component-stack-traces). DevTools now provides an option to automatically append this information to warnings (`console.warn`) and errors (`console.error`).  ![Example console warning with component stack added](https://user-images.githubusercontent.com/29597/62228120-eec3da80-b371-11e9-81bb-018c1e577389.png)  It can be disabled in the general settings panel:  ![Settings panel showing "component stacks" option](https://user-images.githubusercontent.com/29597/62227882-8f65ca80-b371-11e9-8a4e-5d27011ad1aa.png)  ---  ### Components tree changes  #### Component filters  Large component trees can sometimes be hard to navigate. DevTools now provides a way to filter components so that you can hide ones you're not interested in seeing.  ![Component filter demo video](https://user-images.githubusercontent.com/29597/62229209-0bf9a880-b374-11e9-8f84-cebd6c1a016b.gif)  Host nodes (e.g. HTML `<div>`, React Native `View`) are now hidden by default, but you can see them by disabling that filter.  Filter preferences are remembered between sessions.  #### No more inline props  Components in the tree no longer show inline props. This was done to [make DevTools faster](https://github.com/facebook/react/blob/main/packages/react-devtools/OVERVIEW.md) and to make it easier to browse larger component trees.  You can view a component's props, state, and hooks by selecting it:  ![Inspecting props](https://user-images.githubusercontent.c…
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
CLA Signed React Core Team Opened by a member of the React Core Team
Projects
None yet
Development

Successfully merging this pull request may close these issues.

None yet

5 participants