Merge remote-tracking branch 'upstream/master'

* upstream/master: (140 commits)
  support $$props and $$restProps for custom elements (sveltejs#5608)
  Bump eslint-config to 5.5.0 (sveltejs#5599)
  update changelog
  add Node and Element as known globals (sveltejs#5601)
  docs: fix a11y warning in media elements example (sveltejs#5606)
  Curly braces linting fixes (sveltejs#5585)
  refactor sourcemap and preprocessor tests (sveltejs#5583)
  -> v3.29.4
  fix code generation error with nullish coalescing operator and logical operators (sveltejs#5564)
  -> v3.29.3
  -> v3.29.2
  -> v3.29.1
  docs: fix a11y warning in media elements tutorial (sveltejs#5523)
  update changelog
  get context at start of {#if} update block instead of at the end (sveltejs#5531)
  update changelog
  only allow passing functions to lifecycle functions (sveltejs#5529)
  update changelog
  fix compiler hanging on <slot slot="..."> (sveltejs#5536)
  Add svelte@next caveat to bug report template (sveltejs#5561)
  ...

.github/ISSUE_TEMPLATE.md

@@ -8,10 +8,13 @@ the issue. One way we prioritize issues is by the number of :+1: reactions on
 their descriptions. Please DO NOT add `+1` or :+1: comments.
 
 ### Feature requests and proposals
+
 We're excited to hear how we can make Svelte better. Please add as much detail
-as you can on your use case.
+as you can on your use case. To propose an implementation of a large feature or
+change, please create an [RFC](https://github.com/sveltejs/rfcs).
 
 ### Bugs
+
 If you're filing an issue about a bug please include as much information
 as you can including the following.
 

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,6 +7,8 @@ assignees: ''
 
 ---
 
+## Is this about svelte@next? This project is currently in a pre-release stage and breaking changes may occur at any time. Please do not post any kind of bug reports or questions on GitHub about it.
+
 **Describe the bug**
 A clear and concise description of what the bug is.
 

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,6 +7,11 @@ assignees: ''
 
 ---
 
+<!--
+If you'd like to propose an implementation for a large new feature or change then please create an RFC:
+https://github.com/sveltejs/rfcs
+-->
+
 **Is your feature request related to a problem? Please describe.**
 A clear and concise description of what the problem is. For example: I'm always frustrated when [...]
 

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,8 +1,7 @@
-
-
 ### Before submitting the PR, please make sure you do the following
-- [ ] It's really useful if your PR relates to an outstanding issue, so please reference it in your PR, or create an explanatory one for discussion. In many cases, features are absent for a reason.
-- [ ] This message body should clearly illustrate what problems it solves. If there are related issues, remember to reference them.
-- [ ] Ideally, include a test that fails without this PR but passes with it. PRs will only be merged once they pass CI. (Remember to `npm run lint`!)
+- [ ] It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. For large changes, please create an RFC: https://github.com/sveltejs/rfcs
+- [ ] This message body should clearly illustrate what problems it solves.
+- [ ] Ideally, include a test that fails without this PR but passes with it.
+
 ### Tests
--  [ ] Run the tests with `npm test` or `yarn test`)
+-  [ ] Run the tests with `npm test` and lint the project with `npm run lint`

.gitignore

@@ -18,10 +18,6 @@ node_modules
 /coverage/
 /coverage.lcov
 /test/*/samples/_
-/test/sourcemaps/samples/*/output.js
-/test/sourcemaps/samples/*/output.js.map
-/test/sourcemaps/samples/*/output.css
-/test/sourcemaps/samples/*/output.css.map
 /yarn-error.log
 _actual*.*
 _output

.mocharc.js

@@ -0,0 +1,14 @@
+module.exports = {
+	file: [
+		'test/test.ts'
+	],
+	require: [
+		'sucrase/register'
+	]
+};
+
+// add coverage options when running 'npx c8 mocha'
+if (process.env.NODE_V8_COVERAGE) {
+	module.exports.fullTrace = true;
+	module.exports.require.push('source-map-support/register');
+}

CHANGELOG.md

@@ -2,9 +2,92 @@
 
 ## Unreleased
 
+* Fix `$$props` and `$$restProps` when compiling to a custom element ([#5482](https://github.com/sveltejs/svelte/issues/5482))
+* Add `Element` and `Node` to known globals ([#5586](https://github.com/sveltejs/svelte/issues/5586))
+
+## 3.29.4
+
+* Fix code generation error with `??` alongside logical operators ([#5558](https://github.com/sveltejs/svelte/issues/5558))
+
+## 3.29.3
+
+* Hopefully actually republish with proper UMD build for use in the REPL
+
+## 3.29.2
+
+* Republish with proper UMD build for use in the REPL
+
+## 3.29.1
+
+* Fix compiler hanging on `<slot slot="...">` ([#5475](https://github.com/sveltejs/svelte/issues/5475))
+* Fix types on `get` function in `svelte/store` ([#5483](https://github.com/sveltejs/svelte/pull/5483))
+* Add missing `end` field on ASTs for non-top-level `<style>` elements ([#5487](https://github.com/sveltejs/svelte/pull/5487))
+* Fix `{#if}` inside `{#await}` with destructuring ([#5508](https://github.com/sveltejs/svelte/issues/5508))
+* Fix types on lifecycle hooks ([#5529](https://github.com/sveltejs/svelte/pull/5529))
+
+## 3.29.0
+
+* Support `<slot slot="...">` ([#2079](https://github.com/sveltejs/svelte/issues/2079))
+* Fix unmounting components with a bidirectional transition with a delay ([#4954](https://github.com/sveltejs/svelte/issues/4954))
+* Add types to `get` function in `svelte/store` ([#5269](https://github.com/sveltejs/svelte/pull/5269))
+* Add a warning when a component looks like it's trying to use another component without beginning with a capital letter ([#5302](https://github.com/sveltejs/svelte/pull/5302))
+* Add `EventSource` to known globals ([#5463](https://github.com/sveltejs/svelte/issues/5463))
+* Fix compiler exception with `~`/`+` combinators and `{...spread}` attributes ([#5465](https://github.com/sveltejs/svelte/issues/5465))
+
+## 3.28.0
+
+* Add `{#key}` block for keying arbitrary content on an expression ([#1469](https://github.com/sveltejs/svelte/issues/1469))
+
+## 3.27.0
+
+* Add `|nonpassive` event modifier, explicitly passing `passive: false` ([#2068](https://github.com/sveltejs/svelte/issues/2068))
+* Scope CSS selectors with `~` and `+` combinators ([#3104](https://github.com/sveltejs/svelte/issues/3104))
+* Fix keyed `{#each}` not reacting to key changing ([#5444](https://github.com/sveltejs/svelte/issues/5444))
+* Fix destructuring into store values ([#5449](https://github.com/sveltejs/svelte/issues/5449))
+* Fix erroneous `missing-declaration` warning with `use:obj.method` ([#5451](https://github.com/sveltejs/svelte/issues/5451))
+
+## 3.26.0
+
+* Support `use:obj.method` as actions ([#3935](https://github.com/sveltejs/svelte/issues/3935))
+* Support `_` as numeric separator ([#5407](https://github.com/sveltejs/svelte/issues/5407))
+* Fix assignments to properties on store values ([#5412](https://github.com/sveltejs/svelte/issues/5412))
+* Add special style scoping handling of `[open]` selectors on `<details>` elements ([#5421](https://github.com/sveltejs/svelte/issues/5421))
+* Support `import.meta` in template expressions ([#5422](https://github.com/sveltejs/svelte/issues/5422))
+
+## 3.25.1
+
+* Fix specificity of certain styles involving a child selector ([#4795](https://github.com/sveltejs/svelte/issues/4795))
+* Fix transitions that are parameterised with stores ([#5244](https://github.com/sveltejs/svelte/issues/5244))
+* Fix scoping of styles involving child selector and `*` ([#5370](https://github.com/sveltejs/svelte/issues/5370))
+* Fix destructuring which reassigns stores ([#5388](https://github.com/sveltejs/svelte/issues/5388))
+* Fix `{#await}`s with no `{:catch}` getting stuck unresolved if the promise rejects ([#5401](https://github.com/sveltejs/svelte/issues/5401))
+
+## 3.25.0
+
+* Use `null` rather than `undefined` for coerced bound value of `<input type="number">` ([#1701](https://github.com/sveltejs/svelte/issues/1701))
+* Expose object of which slots have received content in `$$slots` ([#2106](https://github.com/sveltejs/svelte/issues/2106))
+* Correctly disallow using lifecycle hooks after synchronous component initialisation ([#4259](https://github.com/sveltejs/svelte/issues/4259), [#4899](https://github.com/sveltejs/svelte/issues/4899))
+* Re-throw an unhandled rejection when an `{#await}` block with no `{:catch}` gets a rejection ([#5129](https://github.com/sveltejs/svelte/issues/5129))
+* Add types to `createEventDispatcher` ([#5211](https://github.com/sveltejs/svelte/issues/5211))
+* In SSR mode, do not automatically declare variables for reactive assignments to member expressions ([#5247](https://github.com/sveltejs/svelte/issues/5247))
+* Include selector in message of `unused-css-selector` warning ([#5252](https://github.com/sveltejs/svelte/issues/5252))
+* Fix using `<Namespaced.Component/>`s in child `{#await}`/`{#each}` contexts ([#5255](https://github.com/sveltejs/svelte/issues/5255))
+* Fix using `<svelte:component>` in `{:catch}` ([#5259](https://github.com/sveltejs/svelte/issues/5259))
+* Fix setting one-way bound `<input>` `value` to `undefined` when it has spread attributes ([#5270](https://github.com/sveltejs/svelte/issues/5270))
+* Fix deep two-way bindings inside an `{#each}` involving a store ([#5286](https://github.com/sveltejs/svelte/issues/5286))
+* Use valid XHTML for elements that are optimised and inserted with `.innerHTML` ([#5315](https://github.com/sveltejs/svelte/issues/5315))
+* Fix reactivity of `$$props` in slot fallback content ([#5367](https://github.com/sveltejs/svelte/issues/5367))
+
+## 3.24.1
+
 * Prevent duplicate invalidation with certain two-way component bindings ([#3180](https://github.com/sveltejs/svelte/issues/3180), [#5117](https://github.com/sveltejs/svelte/issues/5117), [#5144](https://github.com/sveltejs/svelte/issues/5144))
 * Fix reactivity when passing `$$props` to a `<slot>` ([#3364](https://github.com/sveltejs/svelte/issues/3364))
+* Fix transitions on `{#each}` `{:else}` ([#4970](https://github.com/sveltejs/svelte/issues/4970))
 * Fix unneeded invalidation of `$$props` and `$$restProps` ([#4993](https://github.com/sveltejs/svelte/issues/4993), [#5118](https://github.com/sveltejs/svelte/issues/5118))
+* Provide better compiler error message when mismatched tags are due to autoclosing of tags ([#5049](https://github.com/sveltejs/svelte/issues/5049))
+* Add `a11y-label-has-associated-control` warning ([#5074](https://github.com/sveltejs/svelte/pull/5074))
+* Add `a11y-media-has-caption` warning ([#5075](https://github.com/sveltejs/svelte/pull/5075))
+* Fix `bind:group` when using contextual reference ([#5174](https://github.com/sveltejs/svelte/issues/5174))
 
 ## 3.24.0
 

CONTRIBUTING.md

@@ -43,13 +43,16 @@ When [opening a new issue](https://github.com/sveltejs/svelte/issues/new/choose)
 - **One issue, one bug:** Please report a single bug per issue.
 - **Provide reproduction steps:** List all the steps necessary to reproduce the issue. The person reading your bug report should be able to follow these steps to reproduce your issue with minimal effort. If possible, use the [REPL](https://svelte.dev/repl) to create your reproduction.
 
+## RFCs
+
+If you'd like to propose an implementation for a large new feature or change then please [create an RFC](https://github.com/sveltejs/rfcs) to discuss it up front.
+
 ## Installation
 
 1. Ensure you have [npm](https://www.npmjs.com/get-npm) installed.
 1. After cloning the repository, run `npm install` in the root of the repository.
 1. To start a development server, run `npm run dev`.
 
-
 ## Pull requests
 
 ### Your first pull request

README.md

@@ -2,14 +2,15 @@
   <a href="https://svelte.dev">
 	<img alt="Cybernetically enhanced web apps: Svelte" src="https://sveltejs.github.io/assets/banner.png">
   </a>
-
   <a href="https://www.npmjs.com/package/svelte">
     <img src="https://img.shields.io/npm/v/svelte.svg" alt="npm version">
   </a>
-
   <a href="https://github.com/sveltejs/svelte/blob/master/LICENSE">
     <img src="https://img.shields.io/npm/l/svelte.svg" alt="license">
   </a>
+  <a href="https://svelte.dev/chat">
+    <img src="https://img.shields.io/badge/chat-on%20discord-7289da.svg" alt="Chat">
+  </a>
 </p>
 
 
@@ -20,6 +21,15 @@ Svelte is a new way to build web applications. It's a compiler that takes your d
 Learn more at the [Svelte website](https://svelte.dev), or stop by the [Discord chatroom](https://svelte.dev/chat).
 
 
+## Supporting Svelte
+
+Svelte is an MIT-licensed open source project with its ongoing development made possible entirely by the support of awesome volunteers. If you'd like to support their efforts, please consider:
+
+- [Becoming a backer on Open Collective](https://opencollective.com/svelte).
+
+Funds donated via Open Collective will be used for compensating expenses related to Svelte's development such as hosting costs. If sufficient donations are received, funds may also be used to support Svelte's development more directly.
+
+
 ## Development
 
 Pull requests are encouraged and always welcome. [Pick an issue](https://github.com/sveltejs/svelte/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc) and help us out!