Definitely Typed

The repository for high quality TypeScript type definitions.

You can also read this README in Español, 한국어, Русский, 简体中文, Português, Italiano, 日本語 and Français!

Link to Admin manual

!!! Important! This repo has recently changed layout! !!!

Definitely Typed has recently changed to a proper pnpm monorepo; you may want to reread this document for changes to the layout of packages in this repo.

At the very least, you may want to git clean -fdx the repo (or node ./scripts/clean-node-modules.js on Windows) to clean up node_modules and run pnpm install --filter . to install the workspace root. See further sections for more info on pnpm install.

Current status

This section tracks the health of the repository and publishing process. It may be helpful for contributors experiencing any issues with their PRs and packages.

Most recent build type-checked/linted cleanly:
All packages are type-checking/linting cleanly on typescript@next:
All packages are being published to npm in under an hour and a half:
typescript-bot has been active on Definitely Typed
Current infrastructure status updates

If anything here seems wrong or any of the above are failing, please let us know in the Definitely Typed channel on the TypeScript Community Discord server.

What are declaration files and how do I get them?

See the TypeScript handbook.

npm

This is the preferred method. For example:

npm install --save-dev @types/node

The types should then be automatically included by the compiler. You may need to add a types reference if you're not using modules:

/// <reference types="node" />

See more in the handbook.

For an npm package "foo", typings for it will be at "@types/foo".

If your package has typings specified using the types or typings key in its package.json, the npm registry will display that the package has available bindings like so:

If you still can't find the typings, just look for any ".d.ts" files in the package and manually include them with a /// <reference path="" />.

Support Window

Definitely Typed only tests packages on versions of TypeScript that are less than 2 years old.

Older versions of TypeScript

@types packages have tags for versions of TypeScript that they explicitly support, so you can usually get older versions of packages that predate the 2-year window. For example, if you run npm dist-tags @types/react, you'll see that TypeScript 2.5 can use types for react@16.0, whereas TypeScript 2.6 and 2.7 can use types for react@16.4:

Tag	Version
latest	16.9.23
ts2.0	15.0.1
...	...
ts2.5	16.0.36
ts2.6	16.4.7
ts2.7	16.4.7
...	...

TypeScript 1.*

Manually download from the master branch of this repository and place them in your project
~~Typings~~ (use preferred alternatives, typings is deprecated)
~~NuGet~~ (use preferred alternatives, nuget DT type publishing has been turned off)

You may need to add manual references.

How can I contribute?

Definitely Typed only works because of contributions by users like you!

Testing

Before you share your improvement with the world, use the types yourself by creating a typename.d.ts file in your project and filling out its exports:

declare module "libname" {
  // Types inside here
  export function helloWorldMessage(): string
}

Test editing an existing package

You can edit the types directly in node_modules/@types/foo/index.d.ts to validate your changes, then bring the changes to this repo with the steps below.

Alternatively, you can use module augmentation to extend existing types from the DT module or use the declare module technique above which will override the version in node_modules.

Adding tests to a new package

Add to your tsconfig.json:

"baseUrl": "types",
"typeRoots": ["types"],

Create types/foo/index.d.ts containing declarations for the module "foo". You should now be able to import from "foo" in your code and it will route to the new type definition. Then build and run the code to make sure your type definition actually corresponds to what happens at runtime.

Once you've tested your definitions with real code, make a PR then follow the instructions to edit an existing package or create a new package.

Make a pull request

Once you've tested your package, you can share it on Definitely Typed.

First, fork this repository, clone it, install node and run pnpm install. Note that pnpm install will install the entire repository, including packages you may not be editing. If you'd like to install only a subset, you can run pnpm install -w --filter "{./types/foo}..." to install @types/foo and all of its dependencies. If you need to run tests for packages that depend on @types/foo, you can run pnpm install -w --filter "...{./types/foo}..." to pull in all related packages for testing.

Note

If you are using Windows, you may find that git clean does not remove the node_modules directory or hangs when doing so. If you need to remove node_modules, you can run pnpm clean-node-modules to reset the repo.

We use a bot to let a large number of pull requests to DefinitelyTyped be handled entirely in a self-service manner. You can read more about why and how here. Here is a handy reference showing the life cycle of a pull request to DT:

Partial clone

You can clone the entire repository as per usual, but it's large and includes a massive directory of type packages.

You can clone the entire repository as per usual, but it's large and includes a massive directory of type packages. This will take some time to clone and may be unnecessarily unwieldy.

For a more manageable clone that includes only the type packages relevant to you, you can use git's sparse-checkout, --filter and --depth features. This will reduce clone time and improve git performance.

⚠️ This requires minimum git version 2.27.0, which is likely newer than the default on most machines. More complicated procedures are available in older versions, but not covered by this guide.

git clone --sparse --filter=blob:none --depth=1 <forkedUrl>
- --sparse initializes the sparse-checkout file so the working directory starts with only the files in the root of the repository.
- --filter=blob:none will exclude files, fetching them only as needed.
- --depth=1 will further improve clone speed by truncating commit history, but it may cause issues as summarized here.
git sparse-checkout add types/<type> types/<dependency-type> ...

Edit an existing package

Make changes. Remember to edit tests. If you make breaking changes, do not forget to update a major version.
Run pnpm test <package to test>.

When you make a PR to edit an existing package, dt-bot should @-mention previous authors. If it doesn't, you can do so yourself in the comment associated with the PR.

Create a new package

If you are the library author and your package is written in TypeScript, bundle the generated declaration files in your package instead of publishing to Definitely Typed. You can also generate declaration files from JavaScript files, using JSDoc for type annotations.

If you are adding typings for an npm package, create a directory with the same name. If the package you are adding typings for is not on npm, make sure the name you choose for it does not conflict with the name of a package on npm. (You can use npm info <my-package> to check for the existence of the <my-package> package.)

Your package should have this structure:

File	Purpose
`index.d.ts`	This contains the typings for the package.
`<my-package>-tests.ts`	This contains sample code which tests the typings. This code does not run, but it is type-checked.
`tsconfig.json`	This allows you to run `tsc` within the package.
`tslint.json`	Enables linting.
`.eslintrc.json`	(Rarely) Needed only to disable lint rules written for eslint.
`package.json`	Contains metadata for the package, including its name, version and dependencies.

Generate these by running npx dts-gen --dt --name <my-package> --template module. See all options at dts-gen.

If you have .d.ts files besides index.d.ts, make sure that they are referenced either in index.d.ts or the tests.

Definitely Typed members routinely monitor for new PRs, though keep in mind that the number of other PRs may slow things down.

For a good example package, see base64-js.

Removing a package

When a package bundles its own types, types should be removed from Definitely Typed to avoid confusion.

You can remove it by running pnpm run not-needed <typingsPackageName> <asOfVersion> [<libraryName>].

<typingsPackageName>: This is the name of the directory to delete.
<asOfVersion>: A stub will be published to @types/<typingsPackageName> with this version. Should be higher than any currently published version and should be a version of <libraryName> on npm.
<libraryName>: Name of npm package that replaces the Definitely Typed types. Usually this is identical to <typingsPackageName>, in which case you can omit it.

If a package was never on Definitely Typed, it does not need to be added to notNeededPackages.json.

Running tests

Test your changes by running pnpm test <package to test> where <package to test> is the name of your package. You need to run this from the DefinitelyTyped directory because individual package.jsons don't define test scripts.

This script uses dtslint to run the TypeScript compiler against your dts files.

Once you have all your changes ready, use pnpm run test-all to see how your changes affect other modules.

Naming

If you are adding typings for an npm package, create a directory with the same name. If the package you are adding typings for is not on npm, make sure the name you choose for it does not conflict with the name of a package on npm. (You can use npm info <my-package> to check for the existence of the <my-package> package.)

If a non-npm package conflicts with an existing npm package try adding -browser to the end of the name to get <my-package>-browser.

`<my-package>-tests.ts`

There should be a <my-package>-tests.ts file, which is considered your test file, along with any *.ts files it imports. If you don't see any test files in the module's folder, create a <my-package>-tests.ts. These files are used to validate the API exported from the *.d.ts files which are shipped as @types/<my-package>. They do not themselves ship.

Changes to the *.d.ts files should include a corresponding *.ts file change which shows the API being used, so that someone doesn't accidentally break code you depend on. For example, this change to a function in a .d.ts file adding a new param to a function:

index.d.ts:

- export function twoslash(body: string): string
+ export function twoslash(body: string, config?: { version: string }): string

<my-package>-tests.ts:

import {twoslash} from "./"

// $ExpectType string
const result = twoslash("//")

+ // Handle options param
+ const resultWithOptions = twoslash("//", { version: "3.7" })
+ // When the param is incorrect
+ // @ts-expect-error
+ const resultWithOptions = twoslash("//", {  })

If you're wondering where to start with test code, the examples in the README of the original package are a great place to start.

You can validate your changes with npm test <package to test> from the root of this repo, which takes changed files into account.

Use $ExpectType to assert that an expression is of a given type and @ts-expect-error to assert that a compile error. Examples:

// $ExpectType void
f(1);

// @ts-expect-error
f("one");

For more details, see dtslint readme.

Linter: `tslint.json`

The linter configuration file, tslint.json should contain { "extends": "@definitelytyped/dtslint/dt.json" } and no additional rules.

If for some reason some rule needs to be disabled, disable it for that specific line using // tslint:disable-next-line:[ruleName] — not for the whole package, so that disabling can be reviewed. (There are some legacy lint configs that have additional contents, but these should not happen in new work.)

Linter: `.eslintrc.json`

Definitely Typed is in the process of switching to eslint for linting. Unlike tslint, you don't need a config file to enable linting. Like tslint, you should disable specific rules only on specific lines:

// eslint-disable-next-line no-const-enum
const enum Const { One }
const enum Enum { Two } // eslint-disable-line no-const-enum

You can still disable rules with an .eslintrc.json, but should not in new packages.

`tsconfig.json`

tsconfig.json should have noImplicitAny, noImplicitThis, strictNullChecks and strictFunctionTypes set to true.

You may edit the tsconfig.json to add new test files, to add "target": "es6" (needed for async functions), to add to "lib" or to add the "jsx" compiler option.

`esModuleInterop`/`allowSyntheticDefaultImports`

TL;DR: esModuleInterop and allowSyntheticDefaultImports are not allowed in your tsconfig.json.

These options make it possible to write a default import for a CJS export, modeling the built-in interoperability between CJS and ES modules in Node and in some JS bundlers:
// component.d.ts
declare class Component {}
// CJS export, modeling `module.exports = Component` in JS
export = Component;

// index.d.ts
// ESM default import, only allowed under 'esModuleInterop' or 'allowSyntheticDefaultExports'
import Component from "./component";
Since the compile-time validity of the import in index.d.ts is dependent upon specific compilation settings, which users of your types do not inherit, using this pattern in DefinitelyTyped would force users to change their own compilation settings, which might be incorrect for their runtime. Instead, you must write a CJS import for a CJS export to ensure widespread, config-independent compatibility:
// index.d.ts
// CJS import, modeling `const Component = require("./component")` in JS
import Component = require("./component");

`package.json`

This file is required and should follow this template:

{
    "private": true,
    "name": "@types/PACKAGE-NAME",
    "version": "1.2.9999",
    "projects": [
        "https://aframe.io/"
    ],
    "dependencies": {
        "@types/DEPENDENCY-1": "*",
        "@types/DEPENDENCY-2": "*"
    },
    "devDependencies": {
        "@types/PACKAGE-NAME": "workspace:."
    },
    "owners": [
        {
            "name": "Your Name Here",
            "githubUsername": "ghost"
        }
    ]
}

A package.json specifies all dependencies, including other @types packages.

You must add non-@types dependencies to the list of allowed external dependencies. Pikaday is a good example. These additions are approved by a maintainer, which gives us the chance to make sure that @types packages don't depend on malicious packages.

If the implementation package uses ESM and specifies "type": "module", then you should modify package.json to match:

{
    "type": "module"
}

This also applies if the implementation package has exports in its package.json.

`OTHER_FILES.txt`

If a file is neither tested nor referenced in index.d.ts, add it to a file named OTHER_FILES.txt. This file is a list of other files that need to be included in the typings package, one file per line. This file must also be inspected by a maintainer to make sure that malicious files don't ship in @types packages.

Common mistakes

First, follow advice from the handbook.
Formatting: dprint is set up on this repo, so you can run pnpm dprint fmt -- 'path/to/package/**/*.ts'.
- Consider using the VS Code .vscode/settings.template.json (or equivalent for other editors) to format on save with the VS Code dprint extension
function sum(nums: number[]): number: Use ReadonlyArray if a function does not write to its parameters.
interface Foo { new(): Foo; }: This defines a type of objects that are new-able. You probably want declare class Foo { constructor(); }.
const Class: { new(): IClass; }: Prefer to use a class declaration class Class { constructor(); } instead of a new-able constant.
getMeAT<T>(): T: If a type parameter does not appear in the types of any parameters, you don't really have a generic function, you just have a disguised type assertion. Prefer to use a real type assertion, e.g. getMeAT() as number. Example where a type parameter is acceptable: function id<T>(value: T): T;. Example where it is not acceptable: function parseJson<T>(json: string): T;. Exception: new Map<string, number>() is OK.
Using the types Function and Object is almost never a good idea. In 99% of cases it's possible to specify a more specific type. Examples are (x: number) => number for functions and { x: number, y: number } for objects. If there is no certainty at all about the type, any is the right choice, not Object. If the only known fact about the type is that it's some object, use the type object, not Object or { [key: string]: any }.
var foo: string | any: When any is used in a union type, the resulting type is still any. So, while the string portion of this type annotation may look useful, it in fact offers no additional typechecking over simply using any. Depending on the intention, acceptable alternatives could be any, string or string | object.

Definition owners

TL;DR: do not modify .github/CODEOWNERS, always modify list of the owners in the index.d.ts header

DT has the concept of "Definition Owners" which are people who want to maintain the quality of a particular module's types.

Adding yourself to the list will cause you to be notified (via your GitHub username) whenever someone makes a pull request or issue about the package.
Your PR reviews will have a higher precedence of importance to the bot which maintains this repo.
The DT maintainers are putting trust in the definition owners to ensure a stable eco-system, please don't add yourself lightly.

To add yourself as a Definition Owner, modify the owners array in package.json:

"owners": [
    {
        "name": "Some Person",
        "githubUsername": "somebody"
    },
    {
        "name": "Some Corp",
        "url": "https://example.org"
    }
]

Note that this list is not used to provide credit for contributions; it is only used for managing PR reviews.

Once a week the Definition Owners are synced to the file .github/CODEOWNERS which is our source of truth.

The history of Definitely Typed

Definitely Typed is one of the most active repositories on GitHub. You might have wondered how the project came to be. @johnnyreilly wrote a history of Definitely Typed. It tells the story of the early days of Definitely Typed, from a repository created by @borisyankov, to the point where it became a pivotal part of the TypeScript ecosystem. You can read the story of Definitely Typed here.

FAQ

What exactly is the relationship between this repository and the `@types` packages on npm?

The master branch is automatically published to the @types scope on npm thanks to DefinitelyTyped-tools.

I've submitted a pull request. How long until it is merged?

It depends, but most pull requests will be merged within a week. Some PRs can be merged by the owners of a module and they can be merged much faster. Roughly:

PRs which only change the types of a module and have corresponding tests changes will be merged much faster

PRs that have been approved by an author listed in the definition's header are usually merged more quickly; PRs for new definitions will take more time as they require more review from maintainers. Each PR is reviewed by a TypeScript or Definitely Typed team member before being merged, so please be patient as human factors may cause delays. Check the New Pull Request Status Board to see progress as maintainers work through the open PRs.

I'd like to submit a change to a very popular project, why are they treated differently?

For changes to very popular modules, e.g. Node/Express/Jest which have many millions of downloads each per week on npm, the requirements for contributions are a bit higher. Changes to these projects can have massive ecosystem effects and so we treat changes to them with a lot of care. These modules require both a sign-off from a DT maintainer and enthusiastic support from the module owners. The bar for passing this can be quite high and often PRs can go stale because it doesn't have a champion. If you're finding that no-one is committing, try to make your PR have a smaller focus.

My PR is merged; when will the `@types` npm package be updated?

npm packages should update within an hour. If it's been more than an hour, mention the PR number on the Definitely Typed channel on the TypeScript Community Discord server and the current maintainer will get the correct team member to investigate.

I'm writing a definition that depends on another definition. Should I use `<reference types="" />` or an import?

If the module you're referencing is a module (uses export), use an import. If the module you're referencing is an ambient module (uses declare module) or just declares globals, use <reference types="" />.

Some packages have no `tslint.json` and some `tsconfig.json` are missing `"noImplicitAny": true`, `"noImplicitThis": true` or `"strictNullChecks": true`.

Then they are wrong and we've not noticed yet. You can help by submitting a pull request to fix them.

Are Files Formatted Automatically?

Yes, using dprint. We recommend using a dprint extension for your editor.

Pull requests do not require correct formatting to be merged. Any unformatted code will be automatically reformatted after being merged.

💡 If you're a VS Code user, we suggest copying the .vscode/settings.template.json file to .vscode/settings.json. That template sets the dprint VS Code extension as the default formatter in the repo.

Can I request a definition?

Here are the currently requested definitions.

What about type definitions for the DOM?

If types are part of a web standard, they should be contributed to TypeScript-DOM-lib-generator so that they can become part of the default lib.dom.d.ts.

What about type definitions with no matching package?

If there's no source JavaScript code at all, for example if you're writing helper types or types for a spec, you should publish the types yourself, not on Definitely Typed. Because they're meant to provide types for existing JavaScript code, @types packages are not meant to be imported directly. That is, you shouldn't create a Definitely Typed package that's meant to be used like import type { ... } from "@types/foo". Nor should you expect to write import type { ... } from "foo" when there's no foo installed.

This is different from providing types for a browser only JavaScript library or types for an entire environment like node, bun, et al. There, the types are either resolved implicitly or using /// <references types="foo" />.

Should I add an empty namespace to a package that doesn't export a module to use ES6 style imports?

Some packages, like chai-http, export a function.

Importing this module with an ES6 style import in the form import * as foo from "foo"; leads to the error:

error TS2497: Module 'foo' resolves to a non-module entity and cannot be imported using this construct.

This error can be suppressed by merging the function declaration with an empty namespace of the same name, but this practice is discouraged. This is a commonly cited Stack Overflow answer regarding this matter.

It is more appropriate to import the module using the import foo = require("foo"); syntax. Nevertheless, if you want to use a default import like import foo from "foo"; you have two options:

A package uses `export =`, but I prefer to use default imports. Can I change `export =` to `export default`?

Like in the previous question, refer to using either the --allowSyntheticDefaultImports or --esModuleInterop compiler options.

Do not change the type definition if it is accurate. For an npm package, export = is accurate if node -p 'require("foo")' works to import a module and export default is accurate if node -p 'require("foo").default' works to import a module.

I want to use features from very new TypeScript versions.

Then you will have to add a comment to the last line of your definition header (after // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped): // Minimum TypeScript Version: X.Y. This will set the lowest minimum supported version.

However, if your project needs to maintain types that are compatible with, say, 3.7 and above at the same time as types that are compatible with 3.6 or below, you will need to use the typesVersions feature. You can find a detailed explanation of this feature in the official TypeScript documentation.

Here's a short example to get you started:

You'll have to add typesVersions to package.json:

{
  "private": true,
  "types": "index",
  "typesVersions": {
    "<=3.6": { "*": ["ts3.6/*"] }
  }
}

Create the sub-directory mentioned in the typesVersions field inside your types directory (ts3.6/ in this example). ts3.6/ will support TypeScript versions 3.6 and below, so copy the existing types and tests there.

You'll need to delete the definition header from ts3.6/index.d.ts since only the root index.d.ts is supposed to have it.
Back in the root of the package, add the TypeScript 3.7 features you want to use. When people install the package, TypeScript 3.6 and below will start from ts3.6/index.d.ts, whereas TypeScript 3.7 and above will start from index.d.ts.

You can look at bluebird for an example.

I want to add a DOM API not present in TypeScript by default.

This may belong in TypeScript-DOM-lib-generator. See the guidelines there. If the standard is still a draft, it belongs here. Use a name beginning with dom- and include a link to the standard as the "Project" link in the header. When it graduates draft mode, we may remove it from Definitely Typed and deprecate the associated @types package.

How do Definitely Typed package versions relate to versions of the corresponding library?

NOTE: The discussion in this section assumes familiarity with Semantic versioning

Each Definitely Typed package is versioned when published to npm. The DefinitelyTyped-tools (the tool that publishes @types packages to npm) will set the declaration package's version by using the major.minor.9999 version number listed in package.json. For example, here are the first few lines of Node's type declarations for version 20.8.x at the time of writing:

{
    "private": true,
    "name": "@types/node",
    "version": "20.8.9999",
}

Because the version is listed as 20.8.9999, the npm version of the @types/node package will also be 20.8.x. Note that the version in package.json should only contain major.minor version (e.g. 10.12) followed by .9999. This is because only the major and minor release numbers are aligned between library packages and type declaration packages. (The .9999 is to ensure that local @types packages are always newest during local development.) The patch release number of the type declaration package (e.g. .0 in 20.8.0) is initialized to zero by Definitely Typed and is incremented each time a new @types/node package is published to npm for the same major/minor version of the corresponding library.

Sometimes type declaration package versions and library package versions can get out of sync. Below are a few common reasons why, in order of how much they inconvenience users of a library. Only the last case is typically problematic.

As noted above, the patch version of the type declaration package is unrelated to the library patch version. This allows Definitely Typed to safely update type declarations for the same major/minor version of a library.
If updating a package for new functionality, don't forget to update the version number to line up with that version of the library. If users make sure versions correspond between JavaScript packages and their respective @types packages, then npm update should typically just work.
It's common for type declaration package updates to lag behind library updates because it's often library users, not maintainers, who update Definitely Typed when new library features are released. So, there may be a lag of days, weeks or even months before a helpful community member sends a PR to update the type declaration package for a new library release. If you're impacted by this, you can be the change you want to see in the world and you can be that helpful community member!

❗ If you're updating type declarations for a library, always set the major.minor version in package.json to match the library version that you're documenting! ❗

If a library is updated to a new major version with breaking changes, how should I update its type declaration package?

Semantic versioning requires that versions with breaking changes must increment the major version number. For example, a library that removes a publicly exported function after its 3.5.8 release must bump its version to 4.0.0 in its next release. Furthermore, when the library's 4.0.0 release is out, it's Definitely Typed type declaration package should also be updated to 4.0.0, including any breaking changes to the library's API.

Many libraries have a large installed base of developers (including maintainers of other packages using that library as a dependency) who won't move right away to a new version that has breaking changes, because it might be months until a maintainer has time to rewrite code to adapt to the new version. In the meantime, users of old library versions still may want to update type declarations for older versions.

If you intend to continue updating the older version of a library's type declarations, you may create a new subfolder (e.g. /v2/) named for the current (soon to be "old") version and copy existing files from the current version to it.

When creating a new version folder, ensure that the version field of package.json has been updated; pnpm will automatically resolve to this versioned package whenever it's needed. If other packages in the repo need to depend on this new version, ensure that their package.jsons are also updated too.

For example, if we are creating types/history/v2, its package.json would look like:

{
    "private": true,
    "name": "@types/history",
    "version": "2.4.9999",
}

Another package may select this version by specifying:

{
    "private": true,
    "name": "@types/browser-sync",
    "version": "2.26.9999",
    "dependencies": {
        "@types/history": "^2"
    }
}

Also, /// <reference types=".." /> will not work with path mapping, so dependencies must use import.

How do I write definitions for packages that can be used globally and as a module?

The TypeScript handbook contains excellent general information about writing definitions and also this example definition file which shows how to create a definition using ES6-style module syntax, while also specifying objects made available to the global scope. This technique is demonstrated practically in the definition for big.js, which is a library that can be loaded globally via script tag on a web page or imported via require or ES6-style imports.

To test how your definition can be used both when referenced globally or as an imported module, create a test folder and place two test files in there. Name one YourLibraryName-global.test.ts and the other YourLibraryName-module.test.ts. The global test file should exercise the definition according to how it would be used in a script loaded on a web page where the library is available on the global scope - in this scenario you should not specify an import statement. The module test file should exercise the definition according to how it would be used when imported (including the import statement(s)). If you specify a files property in your tsconfig.json file, be sure to include both test files. A practical example of this is also available on the big.js definition.

Please note that it is not required to fully exercise the definition in each test file - it is sufficient to test only the globally accessible elements on the global test file and fully exercise the definition in the module test file or vice versa.

What about scoped packages?

Types for a scoped package @foo/bar should go in types/foo__bar. Note the double underscore.

License

This project is licensed under the MIT license.

Copyrights on the definition files are respective of each contributor listed at the beginning of each definition file.

License

p5-types/DefinitelyTyped

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