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chore: bundle vendor code (#9016)

Browse Source 
This PR removes the manual vendoring process. Third party code can now
be updated using the typical NPM pipeline with types/code bundling done
through Rollup.
This commit is contained in:
jrandolf 2022-09-28 13:03:19 +02:00 committed by GitHub
parent d06a905540
commit f8de7b1273
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
27 changed files with 322 additions and 488 deletions
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2
.eslintrc.js
View File

@ -103,7 +103,7 @@ module.exports = {
{
name: 'mitt',
message:
'Import Mitt from the vendored location: vendor/mitt/src/index.js',
'Import Mitt from the vendored location: vendor/mitt/index.js',
},
],
},

1
.prettierignore
View File

@ -42,6 +42,5 @@ CHANGELOG.md
package-lock.json
package.json
test/assets/
vendor/
docs/
versioned_*/

2
docs/api/puppeteer.eventtype.md
View File

@ -7,5 +7,5 @@ sidebar_label: EventType
**Signature:**
```typescript
export declare type EventType = string | symbol;
declare type EventType = string | symbol;
```

2
docs/api/puppeteer.handler.md
View File

@ -7,5 +7,5 @@ sidebar_label: Handler
**Signature:**
```typescript
export declare type Handler<T = any> = (event?: T) => void;
declare type Handler<T = any> = (event?: T) => void;
```

213
package-lock.json generated
View File

@ -68,12 +68,16 @@
"jpeg-js": "0.4.4",
"mime": "3.0.0",
"minimist": "1.2.6",
"mitt": "^2.1.0",
"mocha": "10.0.0",
"ncp": "2.0.0",
"npm-run-all": "4.1.5",
"pixelmatch": "5.3.0",
"pngjs": "6.0.0",
"prettier": "2.7.1",
"rollup": "^2.79.1",
"rollup-plugin-dts": "^4.2.2",
"rollup-plugin-node-resolve": "^5.2.0",
"semver": "7.3.7",
"sinon": "14.0.0",
"source-map-support": "0.5.21",
@ -1133,6 +1137,15 @@
"@types/node": "*"
}
},
"node_modules/@types/resolve": {
"version": "0.0.8",
"resolved": "https://registry.npmjs.org/@types/resolve/-/resolve-0.0.8.tgz",
"integrity": "sha512-auApPaJf3NPfe18hSoJkp8EbZzer2ISk7o8mCC3M9he/a04+gbMF97NkpD2S8riMGvm4BMRI59/SZQSaLTKpsQ==",
"dev": true,
"dependencies": {
"@types/node": "*"
}
},
"node_modules/@types/rimraf": {
"version": "3.0.2",
"resolved": "https://registry.npmjs.org/@types/rimraf/-/rimraf-3.0.2.tgz",
@ -1743,6 +1756,18 @@
"integrity": "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==",
"dev": true
},
"node_modules/builtin-modules": {
"version": "3.3.0",
"resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-3.3.0.tgz",
"integrity": "sha512-zhaCDicdLuWN5UbN5IMnFqNMhNfo919sH85y2/ea+5Yg9TsTkeZxpL+JLbp6cgYFS4sRLp3YV4S6yDuqVWHYOw==",
"dev": true,
"engines": {
"node": ">=6"
},
"funding": {
"url": "https://github.com/sponsors/sindresorhus"
}
},
"node_modules/c8": {
"version": "7.12.0",
"resolved": "https://registry.npmjs.org/c8/-/c8-7.12.0.tgz",
@ -3413,6 +3438,12 @@
"node": ">=4.0"
}
},
"node_modules/estree-walker": {
"version": "0.6.1",
"resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-0.6.1.tgz",
"integrity": "sha512-SqmZANLWS0mnatqbSfRP5g8OXZC12Fgg1IwNtLsyHDzJizORW4khDfjPqJZsemPWBB2uqykUah5YpQ6epsqC/w==",
"dev": true
},
"node_modules/esutils": {
"version": "2.0.3",
"resolved": "https://registry.npmjs.org/esutils/-/esutils-2.0.3.tgz",
@ -4429,6 +4460,12 @@
"node": ">=0.10.0"
}
},
"node_modules/is-module": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/is-module/-/is-module-1.0.0.tgz",
"integrity": "sha512-51ypPSPCoTEIN9dy5Oy+h4pShgJmPCygKfyRCISBI+JoWT/2oJvK8QPxmwv7b/p239jXrm9M1mlQbyKJ5A152g==",
"dev": true
},
"node_modules/is-negative-zero": {
"version": "2.0.2",
"resolved": "https://registry.npmjs.org/is-negative-zero/-/is-negative-zero-2.0.2.tgz",
@ -4982,6 +5019,18 @@
"node": ">=10"
}
},
"node_modules/magic-string": {
"version": "0.26.4",
"resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.26.4.tgz",
"integrity": "sha512-e5uXtVJ22aEpK9u1+eQf0fSxHeqwyV19K+uGnlROCxUhzwRip9tBsaMViK/0vC3viyPd5Gtucp3UmEp/Q2cPTQ==",
"dev": true,
"dependencies": {
"sourcemap-codec": "^1.4.8"
},
"engines": {
"node": ">=12"
}
},
"node_modules/make-dir": {
"version": "3.1.0",
"resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
@ -5165,6 +5214,12 @@
"node": ">= 6"
}
},
"node_modules/mitt": {
"version": "2.1.0",
"resolved": "https://registry.npmjs.org/mitt/-/mitt-2.1.0.tgz",
"integrity": "sha512-ILj2TpLiysu2wkBbWjAmww7TkZb65aiQO+DkVdUTBpBXq+MHYiETENkKFMtsJZX1Lf4pe4QOrTSjIfUwN5lRdg==",
"dev": true
},
"node_modules/mkdirp-classic": {
"version": "0.5.3",
"resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz",
@ -6436,6 +6491,69 @@
"url": "https://github.com/sponsors/isaacs"
}
},
"node_modules/rollup": {
"version": "2.79.1",
"resolved": "https://registry.npmjs.org/rollup/-/rollup-2.79.1.tgz",
"integrity": "sha512-uKxbd0IhMZOhjAiD5oAFp7BqvkA4Dv47qpOCtaNvng4HBwdbWtdOh8f5nZNuk2rp51PMGk3bzfWu5oayNEuYnw==",
"dev": true,
"bin": {
"rollup": "dist/bin/rollup"
},
"engines": {
"node": ">=10.0.0"
},
"optionalDependencies": {
"fsevents": "~2.3.2"
}
},
"node_modules/rollup-plugin-dts": {
"version": "4.2.2",
"resolved": "https://registry.npmjs.org/rollup-plugin-dts/-/rollup-plugin-dts-4.2.2.tgz",
"integrity": "sha512-A3g6Rogyko/PXeKoUlkjxkP++8UDVpgA7C+Tdl77Xj4fgEaIjPSnxRmR53EzvoYy97VMVwLAOcWJudaVAuxneQ==",
"dev": true,
"dependencies": {
"magic-string": "^0.26.1"
},
"engines": {
"node": ">=v12.22.11"
},
"funding": {
"url": "https://github.com/sponsors/Swatinem"
},
"optionalDependencies": {
"@babel/code-frame": "^7.16.7"
},
"peerDependencies": {
"rollup": "^2.55",
"typescript": "^4.1"
}
},
"node_modules/rollup-plugin-node-resolve": {
"version": "5.2.0",
"resolved": "https://registry.npmjs.org/rollup-plugin-node-resolve/-/rollup-plugin-node-resolve-5.2.0.tgz",
"integrity": "sha512-jUlyaDXts7TW2CqQ4GaO5VJ4PwwaV8VUGA7+km3n6k6xtOEacf61u0VXwN80phY/evMcaS+9eIeJ9MOyDxt5Zw==",
"deprecated": "This package has been deprecated and is no longer maintained. Please use @rollup/plugin-node-resolve.",
"dev": true,
"dependencies": {
"@types/resolve": "0.0.8",
"builtin-modules": "^3.1.0",
"is-module": "^1.0.0",
"resolve": "^1.11.1",
"rollup-pluginutils": "^2.8.1"
},
"peerDependencies": {
"rollup": ">=1.11.0"
}
},
"node_modules/rollup-pluginutils": {
"version": "2.8.2",
"resolved": "https://registry.npmjs.org/rollup-pluginutils/-/rollup-pluginutils-2.8.2.tgz",
"integrity": "sha512-EEp9NhnUkwY8aif6bxgovPHMoMoNr2FulJziTndpt5H9RdwC47GSGuII9XxpSdzVGM0GWrNPHV6ie1LTNJPaLQ==",
"dev": true,
"dependencies": {
"estree-walker": "^0.6.1"
}
},
"node_modules/run-async": {
"version": "2.4.1",
"resolved": "https://registry.npmjs.org/run-async/-/run-async-2.4.1.tgz",
@ -6609,6 +6727,12 @@
"source-map": "^0.6.0"
}
},
"node_modules/sourcemap-codec": {
"version": "1.4.8",
"resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.8.tgz",
"integrity": "sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA==",
"dev": true
},
"node_modules/spdx-correct": {
"version": "3.1.1",
"resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.1.tgz",
@ -8440,6 +8564,15 @@
"@types/node": "*"
}
},
"@types/resolve": {
"version": "0.0.8",
"resolved": "https://registry.npmjs.org/@types/resolve/-/resolve-0.0.8.tgz",
"integrity": "sha512-auApPaJf3NPfe18hSoJkp8EbZzer2ISk7o8mCC3M9he/a04+gbMF97NkpD2S8riMGvm4BMRI59/SZQSaLTKpsQ==",
"dev": true,
"requires": {
"@types/node": "*"
}
},
"@types/rimraf": {
"version": "3.0.2",
"resolved": "https://registry.npmjs.org/@types/rimraf/-/rimraf-3.0.2.tgz",
@ -8863,6 +8996,12 @@
"integrity": "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==",
"dev": true
},
"builtin-modules": {
"version": "3.3.0",
"resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-3.3.0.tgz",
"integrity": "sha512-zhaCDicdLuWN5UbN5IMnFqNMhNfo919sH85y2/ea+5Yg9TsTkeZxpL+JLbp6cgYFS4sRLp3YV4S6yDuqVWHYOw==",
"dev": true
},
"c8": {
"version": "7.12.0",
"resolved": "https://registry.npmjs.org/c8/-/c8-7.12.0.tgz",
@ -10022,6 +10161,12 @@
"integrity": "sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==",
"dev": true
},
"estree-walker": {
"version": "0.6.1",
"resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-0.6.1.tgz",
"integrity": "sha512-SqmZANLWS0mnatqbSfRP5g8OXZC12Fgg1IwNtLsyHDzJizORW4khDfjPqJZsemPWBB2uqykUah5YpQ6epsqC/w==",
"dev": true
},
"esutils": {
"version": "2.0.3",
"resolved": "https://registry.npmjs.org/esutils/-/esutils-2.0.3.tgz",
@ -10755,6 +10900,12 @@
"is-extglob": "^2.1.1"
}
},
"is-module": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/is-module/-/is-module-1.0.0.tgz",
"integrity": "sha512-51ypPSPCoTEIN9dy5Oy+h4pShgJmPCygKfyRCISBI+JoWT/2oJvK8QPxmwv7b/p239jXrm9M1mlQbyKJ5A152g==",
"dev": true
},
"is-negative-zero": {
"version": "2.0.2",
"resolved": "https://registry.npmjs.org/is-negative-zero/-/is-negative-zero-2.0.2.tgz",
@ -11179,6 +11330,15 @@
"yallist": "^4.0.0"
}
},
"magic-string": {
"version": "0.26.4",
"resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.26.4.tgz",
"integrity": "sha512-e5uXtVJ22aEpK9u1+eQf0fSxHeqwyV19K+uGnlROCxUhzwRip9tBsaMViK/0vC3viyPd5Gtucp3UmEp/Q2cPTQ==",
"dev": true,
"requires": {
"sourcemap-codec": "^1.4.8"
}
},
"make-dir": {
"version": "3.1.0",
"resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
@ -11312,6 +11472,12 @@
"kind-of": "^6.0.3"
}
},
"mitt": {
"version": "2.1.0",
"resolved": "https://registry.npmjs.org/mitt/-/mitt-2.1.0.tgz",
"integrity": "sha512-ILj2TpLiysu2wkBbWjAmww7TkZb65aiQO+DkVdUTBpBXq+MHYiETENkKFMtsJZX1Lf4pe4QOrTSjIfUwN5lRdg==",
"dev": true
},
"mkdirp-classic": {
"version": "0.5.3",
"resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz",
@ -12251,6 +12417,47 @@
}
}
},
"rollup": {
"version": "2.79.1",
"resolved": "https://registry.npmjs.org/rollup/-/rollup-2.79.1.tgz",
"integrity": "sha512-uKxbd0IhMZOhjAiD5oAFp7BqvkA4Dv47qpOCtaNvng4HBwdbWtdOh8f5nZNuk2rp51PMGk3bzfWu5oayNEuYnw==",
"dev": true,
"requires": {
"fsevents": "~2.3.2"
}
},
"rollup-plugin-dts": {
"version": "4.2.2",
"resolved": "https://registry.npmjs.org/rollup-plugin-dts/-/rollup-plugin-dts-4.2.2.tgz",
"integrity": "sha512-A3g6Rogyko/PXeKoUlkjxkP++8UDVpgA7C+Tdl77Xj4fgEaIjPSnxRmR53EzvoYy97VMVwLAOcWJudaVAuxneQ==",
"dev": true,
"requires": {
"@babel/code-frame": "^7.16.7",
"magic-string": "^0.26.1"
}
},
"rollup-plugin-node-resolve": {
"version": "5.2.0",
"resolved": "https://registry.npmjs.org/rollup-plugin-node-resolve/-/rollup-plugin-node-resolve-5.2.0.tgz",
"integrity": "sha512-jUlyaDXts7TW2CqQ4GaO5VJ4PwwaV8VUGA7+km3n6k6xtOEacf61u0VXwN80phY/evMcaS+9eIeJ9MOyDxt5Zw==",
"dev": true,
"requires": {
"@types/resolve": "0.0.8",
"builtin-modules": "^3.1.0",
"is-module": "^1.0.0",
"resolve": "^1.11.1",
"rollup-pluginutils": "^2.8.1"
}
},
"rollup-pluginutils": {
"version": "2.8.2",
"resolved": "https://registry.npmjs.org/rollup-pluginutils/-/rollup-pluginutils-2.8.2.tgz",
"integrity": "sha512-EEp9NhnUkwY8aif6bxgovPHMoMoNr2FulJziTndpt5H9RdwC47GSGuII9XxpSdzVGM0GWrNPHV6ie1LTNJPaLQ==",
"dev": true,
"requires": {
"estree-walker": "^0.6.1"
}
},
"run-async": {
"version": "2.4.1",
"resolved": "https://registry.npmjs.org/run-async/-/run-async-2.4.1.tgz",
@ -12379,6 +12586,12 @@
"source-map": "^0.6.0"
}
},
"sourcemap-codec": {
"version": "1.4.8",
"resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.8.tgz",
"integrity": "sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA==",
"dev": true
},
"spdx-correct": {
"version": "3.1.1",
"resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.1.tgz",

11
package.json
View File

@ -57,10 +57,11 @@
"check:protocol-revision": "tsx scripts/ensure-correct-devtools-protocol-package",
"check:pinned-deps": "tsx scripts/ensure-pinned-deps",
"build": "npm run build:prod",
"build:dev": "run-s generate:sources build:tsc:dev generate:artifacts",
"build:prod": "run-s generate:sources build:tsc:prod generate:artifacts",
"build:dev": "run-s generate:sources build:tsc:dev && run-p bundle:vendor generate:artifacts",
"build:prod": "run-s generate:sources build:tsc:prod && run-p bundle:vendor generate:artifacts",
"build:tsc:dev": "tsc -b test",
"build:tsc:prod": "tsc -b tsconfig.lib.json"
"build:tsc:prod": "tsc -b tsconfig.lib.json",
"bundle:vendor": "rollup --config rollup.vendor.config.js"
},
"files": [
"lib",
@ -129,12 +130,16 @@
"jpeg-js": "0.4.4",
"mime": "3.0.0",
"minimist": "1.2.6",
"mitt": "2.1.0",
"mocha": "10.0.0",
"ncp": "2.0.0",
"npm-run-all": "4.1.5",
"pixelmatch": "5.3.0",
"pngjs": "6.0.0",
"prettier": "2.7.1",
"rollup": "2.79.1",
"rollup-plugin-dts": "4.2.2",
"rollup-plugin-node-resolve": "5.2.0",
"semver": "7.3.7",
"sinon": "14.0.0",
"source-map-support": "0.5.21",

39
rollup.vendor.config.js Normal file
View File

@ -0,0 +1,39 @@
/**
* Copyright 2022 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import path from 'path';
import dts from 'rollup-plugin-dts';
import resolve from 'rollup-plugin-node-resolve';
import glob from 'glob';
export default ['cjs', 'esm'].flatMap(outputType => {
const configs = [];
const vendorPath = path.resolve(__dirname, `lib/${outputType}/vendor`);
for (const jsFile of glob.sync(path.join(vendorPath, '**/*.js'))) {
configs.push({
input: jsFile,
output: {file: jsFile, exports: 'auto', format: outputType},
plugins: [resolve()],
});
}
for (const typesFile of glob.sync(path.join(vendorPath, '**/*.d.ts'))) {
configs.push({
input: typesFile,
output: {file: typesFile, format: outputType},
plugins: [dts({respectExternal: true})],
});
}
return configs;
});

6
src/common/EventEmitter.ts
View File

@ -14,11 +14,7 @@
* limitations under the License.
*/
import mitt, {
Emitter,
EventType,
Handler,
} from '../../vendor/mitt/src/index.js';
import mitt, {Emitter, EventType, Handler} from '../../vendor/mitt/index.js';
/**
* @public

4
src/tsconfig.cjs.json
View File

@ -6,7 +6,7 @@
"module": "CommonJS"
},
"references": [
{"path": "../vendor/tsconfig.cjs.json"},
{"path": "../compat/cjs/tsconfig.json"}
{"path": "../compat/cjs/tsconfig.json"},
{"path": "../vendor/tsconfig.json"}
]
}

4
src/tsconfig.esm.json
View File

@ -6,7 +6,7 @@
"module": "esnext"
},
"references": [
{"path": "../vendor/tsconfig.esm.json"},
{"path": "../compat/esm/tsconfig.json"}
{"path": "../compat/esm/tsconfig.json"},
{"path": "../vendor/tsconfig.cjs.json"}
]
}

33
vendor/README.md vendored
View File

@ -1,13 +1,28 @@
# Vendoring third party dependencies
# `vendor`
Because we are working towards an agnostic Puppeteer that can run in any environment (see [#6125](https://github.com/puppeteer/puppeteer/issues/6125)) we cannot import common dependencies in a way that relies on Node's resolution to find them. For example, `import mitt from 'mitt'` works fine in Node, but in an ESM build running in the browser, the browser has no idea where to find `'mitt'`.
This folder contains code that interacts with third party node modules that will
be vendored with puppeteer during publishing.
Therefore we put all common dependencies into this directory, `vendor`. This means there are extra criteria for these dependencies; ideally they will not depend on any other modules. If they do, we should consider an alternative way of managing our dependencies.
## Why not `node_modules`?
The process for updating a vendored dependency is:
Because we are working towards an agnostic Puppeteer that can run in any
environment (see [#6125](https://github.com/puppeteer/puppeteer/issues/6125)) we
cannot import common dependencies in a way that relies on Node's resolution to
find them. For example, `import mitt from 'mitt'` works fine in Node, but in an
ESM build running in an environment without module resolution such as the
browser, `'mitt'` would not make sense.
1. `npm install {DEP NAME HERE}`
2. `cp -r node_modules/DEP vendor`
3. Update `eslintrc.js` to forbid importing DEP directly (see the `Mitt` rule already defined in there).
4. Use the new DEP, and run `npm run build && npm run build:dev` to check everything compiles successfully.
5. If the dep ships as compiled JS, you may need to disable TypeScript checking the file. Add an entry to the `excludes` property of the TSConfig files in `vendor`. (again, see the entry that's already there for Mitt as an example). Don't forget to update both the ESM and CJS config files.
The process for installing/using a vendored dependency is a two-step process:
1. Create a folder named after the package. See the `node_modules` folder for
inspiration.
2. Create an entrypoint that exports needed imports from the package. For
example, `index.ts` may contain
```ts
export * from 'your-package';
export {default as default} from 'your-package';
```
Now if you need to import from the dependency, you need to import relative to
this directory rather than the package name itself.

179
vendor/mitt/README.md vendored
View File

@ -1,179 +0,0 @@
<p align="center">
<img src="https://i.imgur.com/BqsX9NT.png" width="300" height="300" alt="mitt">
<br>
<a href="https://www.npmjs.org/package/mitt"><img src="https://img.shields.io/npm/v/mitt.svg" alt="npm"></a>
<img src="https://github.com/developit/mitt/workflows/CI/badge.svg" alt="build status">
<a href="https://unpkg.com/mitt/dist/mitt.js"><img src="https://img.badgesize.io/https://unpkg.com/mitt/dist/mitt.js?compression=gzip" alt="gzip size"></a>
</p>
# Mitt
> Tiny 200b functional event emitter / pubsub.
- **Microscopic:** weighs less than 200 bytes gzipped
- **Useful:** a wildcard `"*"` event type listens to all events
- **Familiar:** same names & ideas as [Node's EventEmitter](https://nodejs.org/api/events.html#events_class_eventemitter)
- **Functional:** methods don't rely on `this`
- **Great Name:** somehow [mitt](https://npm.im/mitt) wasn't taken
Mitt was made for the browser, but works in any JavaScript runtime. It has no dependencies and supports IE9+.
## Table of Contents
- [Install](#install)
- [Usage](#usage)
- [Examples & Demos](#examples--demos)
- [API](#api)
- [Contribute](#contribute)
- [License](#license)
## Install
This project uses [node](http://nodejs.org) and [npm](https://npmjs.com). Go check them out if you don't have them locally installed.
```sh
$ npm install --save mitt
```
Then with a module bundler like [rollup](http://rollupjs.org/) or [webpack](https://webpack.js.org/), use as you would anything else:
```javascript
// using ES6 modules
import mitt from 'mitt'
// using CommonJS modules
var mitt = require('mitt')
```
The [UMD](https://github.com/umdjs/umd) build is also available on [unpkg](https://unpkg.com):
```html
<script src="https://unpkg.com/mitt/dist/mitt.umd.js"></script>
```
You can find the library on `window.mitt`.
## Usage
```ts
import mitt from 'mitt'
const emitter = mitt()
// listen to an event
emitter.on('foo', e => console.log('foo', e) )
// listen to all events
emitter.on('*', (type, e) => console.log(type, e) )
// fire an event
emitter.emit('foo', { a: 'b' })
// clearing all events
emitter.all.clear()
// working with handler references:
function onFoo() {}
emitter.on('foo', onFoo) // listen
emitter.off('foo', onFoo) // unlisten
```
### Typescript
```ts
import mitt from 'mitt';
const emitter: mitt.Emitter = mitt();
```
## Examples & Demos
<a href="http://codepen.io/developit/pen/rjMEwW?editors=0110">
<b>Preact + Mitt Codepen Demo</b>
<br>
<img src="https://i.imgur.com/CjBgOfJ.png" width="278" alt="preact + mitt preview">
</a>
* * *
## API
<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
#### Table of Contents
- [mitt](#mitt)
- [all](#all)
- [on](#on)
- [Parameters](#parameters)
- [off](#off)
- [Parameters](#parameters-1)
- [emit](#emit)
- [Parameters](#parameters-2)
### mitt
Mitt: Tiny (~200b) functional event emitter / pubsub.
Returns **Mitt**
### all
A Map of event names to registered handler functions.
### on
Register an event handler for the given type.
#### Parameters
- `type` **([string](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String) \| [symbol](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol))** Type of event to listen for, or `"*"` for all events
- `handler` **[Function](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function)** Function to call in response to given event
### off
Remove an event handler for the given type.
#### Parameters
- `type` **([string](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String) \| [symbol](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol))** Type of event to unregister `handler` from, or `"*"`
- `handler` **[Function](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function)** Handler function to remove
### emit
Invoke all handlers for the given type.
If present, `"*"` handlers are invoked after type-matched handlers.
Note: Manually firing "\*" handlers is not supported.
#### Parameters
- `type` **([string](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String) \| [symbol](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol))** The event type to invoke
- `evt` **Any?** Any value (object is recommended and powerful), passed to each handler
## Contribute
First off, thanks for taking the time to contribute!
Now, take a moment to be sure your contributions make sense to everyone else.
### Reporting Issues
Found a problem? Want a new feature? First of all see if your issue or idea has [already been reported](../../issues).
If don't, just open a [new clear and descriptive issue](../../issues/new).
### Submitting pull requests
Pull requests are the greatest contributions, so be sure they are focused in scope, and do avoid unrelated commits.
- Fork it!
- Clone your fork: `git clone https://github.com/<your-username>/mitt`
- Navigate to the newly cloned directory: `cd mitt`
- Create a new branch for the new feature: `git checkout -b my-new-feature`
- Install the tools necessary for development: `npm install`
- Make your changes.
- Commit your changes: `git commit -am 'Add some feature'`
- Push to the branch: `git push origin my-new-feature`
- Submit a pull request with full remarks documenting your changes.
## License
[MIT License](https://opensource.org/licenses/MIT) © [Jason Miller](https://jasonformat.com/)

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export default function(n){return{all:n=n||new Map,on:function(t,e){var i=n.get(t);i&&i.push(e)||n.set(t,[e])},off:function(t,e){var i=n.get(t);i&&i.splice(i.indexOf(e)>>>0,1)},emit:function(t,e){(n.get(t)||[]).slice().map(function(n){n(e)}),(n.get("*")||[]).slice().map(function(n){n(t,e)})}}}
//# sourceMappingURL=mitt.es.js.map

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{"version":3,"file":"mitt.es.js","sources":["../src/index.ts"],"sourcesContent":["export type EventType = string | symbol;\n\n// An event handler can take an optional event argument\n// and should not return a value\nexport type Handler<T = any> = (event?: T) => void;\nexport type WildcardHandler = (type: EventType, event?: any) => void;\n\n// An array of all currently registered event handlers for a type\nexport type EventHandlerList = Array<Handler>;\nexport type WildCardEventHandlerList = Array<WildcardHandler>;\n\n// A map of event types and their corresponding event handlers.\nexport type EventHandlerMap = Map<EventType, EventHandlerList | WildCardEventHandlerList>;\n\nexport interface Emitter {\n\tall: EventHandlerMap;\n\n\ton<T = any>(type: EventType, handler: Handler<T>): void;\n\ton(type: '*', handler: WildcardHandler): void;\n\n\toff<T = any>(type: EventType, handler: Handler<T>): void;\n\toff(type: '*', handler: WildcardHandler): void;\n\n\temit<T = any>(type: EventType, event?: T): void;\n\temit(type: '*', event?: any): void;\n}\n\n/**\n * Mitt: Tiny (~200b) functional event emitter / pubsub.\n * @name mitt\n * @returns {Mitt}\n */\nexport default function mitt(all?: EventHandlerMap): Emitter {\n\tall = all || new Map();\n\n\treturn {\n\n\t\t/**\n\t\t * A Map of event names to registered handler functions.\n\t\t */\n\t\tall,\n\n\t\t/**\n\t\t * Register an event handler for the given type.\n\t\t * @param {string|symbol} type Type of event to listen for, or `\"*\"` for all events\n\t\t * @param {Function} handler Function to call in response to given event\n\t\t * @memberOf mitt\n\t\t */\n\t\ton<T = any>(type: EventType, handler: Handler<T>) {\n\t\t\tconst handlers = all.get(type);\n\t\t\tconst added = handlers && handlers.push(handler);\n\t\t\tif (!added) {\n\t\t\t\tall.set(type, [handler]);\n\t\t\t}\n\t\t},\n\n\t\t/**\n\t\t * Remove an event handler for the given type.\n\t\t * @param {string|symbol} type Type of event to unregister `handler` from, or `\"*\"`\n\t\t * @param {Function} handler Handler function to remove\n\t\t * @memberOf mitt\n\t\t */\n\t\toff<T = any>(type: EventType, handler: Handler<T>) {\n\t\t\tconst handlers = all.get(type);\n\t\t\tif (handlers) {\n\t\t\t\thandlers.splice(handlers.indexOf(handler) >>> 0, 1);\n\t\t\t}\n\t\t},\n\n\t\t/**\n\t\t * Invoke all handlers for the given type.\n\t\t * If present, `\"*\"` handlers are invoked after type-matched handlers.\n\t\t *\n\t\t * Note: Manually firing \"*\" handlers is not supported.\n\t\t *\n\t\t * @param {string|symbol} type The event type to invoke\n\t\t * @param {Any} [evt] Any value (object is recommended and powerful), passed to each handler\n\t\t * @memberOf mitt\n\t\t */\n\t\temit<T = any>(type: EventType, evt: T) {\n\t\t\t((all.get(type) || []) as EventHandlerList).slice().map((handler) => { handler(evt); });\n\t\t\t((all.get('*') || []) as WildCardEventHandlerList).slice().map((handler) => { handler(type, evt); });\n\t\t}\n\t};\n}\n"],"names":["all","Map","on","type","handler","handlers","get","push","set","off","splice","indexOf","emit","evt","slice","map"],"mappings":"wBAgC6BA,GAG5B,MAAO,CAKNA,IAPDA,EAAMA,GAAO,IAAIC,IAehBC,YAAYC,EAAiBC,GAC5B,IAAMC,EAAWL,EAAIM,IAAIH,GACXE,GAAYA,EAASE,KAAKH,IAEvCJ,EAAIQ,IAAIL,EAAM,CAACC,KAUjBK,aAAaN,EAAiBC,GAC7B,IAAMC,EAAWL,EAAIM,IAAIH,GACrBE,GACHA,EAASK,OAAOL,EAASM,QAAQP,KAAa,EAAG,IAcnDQ,cAAcT,EAAiBU,IAC5Bb,EAAIM,IAAIH,IAAS,IAAyBW,QAAQC,IAAI,SAACX,GAAcA,EAAQS,MAC7Eb,EAAIM,IAAI,MAAQ,IAAiCQ,QAAQC,IAAI,SAACX,GAAcA,EAAQD,EAAMU"}

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module.exports=function(n){return{all:n=n||new Map,on:function(e,t){var i=n.get(e);i&&i.push(t)||n.set(e,[t])},off:function(e,t){var i=n.get(e);i&&i.splice(i.indexOf(t)>>>0,1)},emit:function(e,t){(n.get(e)||[]).slice().map(function(n){n(t)}),(n.get("*")||[]).slice().map(function(n){n(e,t)})}}};
//# sourceMappingURL=mitt.js.map

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{"version":3,"file":"mitt.js","sources":["../src/index.ts"],"sourcesContent":["export type EventType = string | symbol;\n\n// An event handler can take an optional event argument\n// and should not return a value\nexport type Handler<T = any> = (event?: T) => void;\nexport type WildcardHandler = (type: EventType, event?: any) => void;\n\n// An array of all currently registered event handlers for a type\nexport type EventHandlerList = Array<Handler>;\nexport type WildCardEventHandlerList = Array<WildcardHandler>;\n\n// A map of event types and their corresponding event handlers.\nexport type EventHandlerMap = Map<EventType, EventHandlerList | WildCardEventHandlerList>;\n\nexport interface Emitter {\n\tall: EventHandlerMap;\n\n\ton<T = any>(type: EventType, handler: Handler<T>): void;\n\ton(type: '*', handler: WildcardHandler): void;\n\n\toff<T = any>(type: EventType, handler: Handler<T>): void;\n\toff(type: '*', handler: WildcardHandler): void;\n\n\temit<T = any>(type: EventType, event?: T): void;\n\temit(type: '*', event?: any): void;\n}\n\n/**\n * Mitt: Tiny (~200b) functional event emitter / pubsub.\n * @name mitt\n * @returns {Mitt}\n */\nexport default function mitt(all?: EventHandlerMap): Emitter {\n\tall = all || new Map();\n\n\treturn {\n\n\t\t/**\n\t\t * A Map of event names to registered handler functions.\n\t\t */\n\t\tall,\n\n\t\t/**\n\t\t * Register an event handler for the given type.\n\t\t * @param {string|symbol} type Type of event to listen for, or `\"*\"` for all events\n\t\t * @param {Function} handler Function to call in response to given event\n\t\t * @memberOf mitt\n\t\t */\n\t\ton<T = any>(type: EventType, handler: Handler<T>) {\n\t\t\tconst handlers = all.get(type);\n\t\t\tconst added = handlers && handlers.push(handler);\n\t\t\tif (!added) {\n\t\t\t\tall.set(type, [handler]);\n\t\t\t}\n\t\t},\n\n\t\t/**\n\t\t * Remove an event handler for the given type.\n\t\t * @param {string|symbol} type Type of event to unregister `handler` from, or `\"*\"`\n\t\t * @param {Function} handler Handler function to remove\n\t\t * @memberOf mitt\n\t\t */\n\t\toff<T = any>(type: EventType, handler: Handler<T>) {\n\t\t\tconst handlers = all.get(type);\n\t\t\tif (handlers) {\n\t\t\t\thandlers.splice(handlers.indexOf(handler) >>> 0, 1);\n\t\t\t}\n\t\t},\n\n\t\t/**\n\t\t * Invoke all handlers for the given type.\n\t\t * If present, `\"*\"` handlers are invoked after type-matched handlers.\n\t\t *\n\t\t * Note: Manually firing \"*\" handlers is not supported.\n\t\t *\n\t\t * @param {string|symbol} type The event type to invoke\n\t\t * @param {Any} [evt] Any value (object is recommended and powerful), passed to each handler\n\t\t * @memberOf mitt\n\t\t */\n\t\temit<T = any>(type: EventType, evt: T) {\n\t\t\t((all.get(type) || []) as EventHandlerList).slice().map((handler) => { handler(evt); });\n\t\t\t((all.get('*') || []) as WildCardEventHandlerList).slice().map((handler) => { handler(type, evt); });\n\t\t}\n\t};\n}\n"],"names":["all","Map","on","type","handler","handlers","get","push","set","off","splice","indexOf","emit","evt","slice","map"],"mappings":"wBAgC6BA,GAG5B,MAAO,CAKNA,IAPDA,EAAMA,GAAO,IAAIC,IAehBC,YAAYC,EAAiBC,GAC5B,IAAMC,EAAWL,EAAIM,IAAIH,GACXE,GAAYA,EAASE,KAAKH,IAEvCJ,EAAIQ,IAAIL,EAAM,CAACC,KAUjBK,aAAaN,EAAiBC,GAC7B,IAAMC,EAAWL,EAAIM,IAAIH,GACrBE,GACHA,EAASK,OAAOL,EAASM,QAAQP,KAAa,EAAG,IAcnDQ,cAAcT,EAAiBU,IAC5Bb,EAAIM,IAAIH,IAAS,IAAyBW,QAAQC,IAAI,SAACX,GAAcA,EAAQS,MAC7Eb,EAAIM,IAAI,MAAQ,IAAiCQ,QAAQC,IAAI,SAACX,GAAcA,EAAQD,EAAMU"}

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export default function(e){return{all:e=e||new Map,on(t,n){const s=e.get(t);s&&s.push(n)||e.set(t,[n])},off(t,n){const s=e.get(t);s&&s.splice(s.indexOf(n)>>>0,1)},emit(t,n){(e.get(t)||[]).slice().map(e=>{e(n)}),(e.get("*")||[]).slice().map(e=>{e(t,n)})}}}
//# sourceMappingURL=mitt.modern.js.map

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{"version":3,"file":"mitt.modern.js","sources":["../src/index.ts"],"sourcesContent":["export type EventType = string | symbol;\n\n// An event handler can take an optional event argument\n// and should not return a value\nexport type Handler<T = any> = (event?: T) => void;\nexport type WildcardHandler = (type: EventType, event?: any) => void;\n\n// An array of all currently registered event handlers for a type\nexport type EventHandlerList = Array<Handler>;\nexport type WildCardEventHandlerList = Array<WildcardHandler>;\n\n// A map of event types and their corresponding event handlers.\nexport type EventHandlerMap = Map<EventType, EventHandlerList | WildCardEventHandlerList>;\n\nexport interface Emitter {\n\tall: EventHandlerMap;\n\n\ton<T = any>(type: EventType, handler: Handler<T>): void;\n\ton(type: '*', handler: WildcardHandler): void;\n\n\toff<T = any>(type: EventType, handler: Handler<T>): void;\n\toff(type: '*', handler: WildcardHandler): void;\n\n\temit<T = any>(type: EventType, event?: T): void;\n\temit(type: '*', event?: any): void;\n}\n\n/**\n * Mitt: Tiny (~200b) functional event emitter / pubsub.\n * @name mitt\n * @returns {Mitt}\n */\nexport default function mitt(all?: EventHandlerMap): Emitter {\n\tall = all || new Map();\n\n\treturn {\n\n\t\t/**\n\t\t * A Map of event names to registered handler functions.\n\t\t */\n\t\tall,\n\n\t\t/**\n\t\t * Register an event handler for the given type.\n\t\t * @param {string|symbol} type Type of event to listen for, or `\"*\"` for all events\n\t\t * @param {Function} handler Function to call in response to given event\n\t\t * @memberOf mitt\n\t\t */\n\t\ton<T = any>(type: EventType, handler: Handler<T>) {\n\t\t\tconst handlers = all.get(type);\n\t\t\tconst added = handlers && handlers.push(handler);\n\t\t\tif (!added) {\n\t\t\t\tall.set(type, [handler]);\n\t\t\t}\n\t\t},\n\n\t\t/**\n\t\t * Remove an event handler for the given type.\n\t\t * @param {string|symbol} type Type of event to unregister `handler` from, or `\"*\"`\n\t\t * @param {Function} handler Handler function to remove\n\t\t * @memberOf mitt\n\t\t */\n\t\toff<T = any>(type: EventType, handler: Handler<T>) {\n\t\t\tconst handlers = all.get(type);\n\t\t\tif (handlers) {\n\t\t\t\thandlers.splice(handlers.indexOf(handler) >>> 0, 1);\n\t\t\t}\n\t\t},\n\n\t\t/**\n\t\t * Invoke all handlers for the given type.\n\t\t * If present, `\"*\"` handlers are invoked after type-matched handlers.\n\t\t *\n\t\t * Note: Manually firing \"*\" handlers is not supported.\n\t\t *\n\t\t * @param {string|symbol} type The event type to invoke\n\t\t * @param {Any} [evt] Any value (object is recommended and powerful), passed to each handler\n\t\t * @memberOf mitt\n\t\t */\n\t\temit<T = any>(type: EventType, evt: T) {\n\t\t\t((all.get(type) || []) as EventHandlerList).slice().map((handler) => { handler(evt); });\n\t\t\t((all.get('*') || []) as WildCardEventHandlerList).slice().map((handler) => { handler(type, evt); });\n\t\t}\n\t};\n}\n"],"names":["all","Map","on","type","handler","handlers","get","push","set","off","splice","indexOf","emit","evt","slice","map"],"mappings":"wBAgC6BA,GAG5B,MAAO,CAKNA,IAPDA,EAAMA,GAAO,IAAIC,IAehBC,GAAYC,EAAiBC,GAC5B,MAAMC,EAAWL,EAAIM,IAAIH,GACXE,GAAYA,EAASE,KAAKH,IAEvCJ,EAAIQ,IAAIL,EAAM,CAACC,KAUjBK,IAAaN,EAAiBC,GAC7B,MAAMC,EAAWL,EAAIM,IAAIH,GACrBE,GACHA,EAASK,OAAOL,EAASM,QAAQP,KAAa,EAAG,IAcnDQ,KAAcT,EAAiBU,IAC5Bb,EAAIM,IAAIH,IAAS,IAAyBW,QAAQC,IAAKX,IAAcA,EAAQS,MAC7Eb,EAAIM,IAAI,MAAQ,IAAiCQ,QAAQC,IAAKX,IAAcA,EAAQD,EAAMU"}

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!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):(e=e||self).mitt=n()}(this,function(){return function(e){return{all:e=e||new Map,on:function(n,t){var f=e.get(n);f&&f.push(t)||e.set(n,[t])},off:function(n,t){var f=e.get(n);f&&f.splice(f.indexOf(t)>>>0,1)},emit:function(n,t){(e.get(n)||[]).slice().map(function(e){e(t)}),(e.get("*")||[]).slice().map(function(e){e(n,t)})}}}});
//# sourceMappingURL=mitt.umd.js.map

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{"version":3,"file":"mitt.umd.js","sources":["../src/index.ts"],"sourcesContent":["export type EventType = string | symbol;\n\n// An event handler can take an optional event argument\n// and should not return a value\nexport type Handler<T = any> = (event?: T) => void;\nexport type WildcardHandler = (type: EventType, event?: any) => void;\n\n// An array of all currently registered event handlers for a type\nexport type EventHandlerList = Array<Handler>;\nexport type WildCardEventHandlerList = Array<WildcardHandler>;\n\n// A map of event types and their corresponding event handlers.\nexport type EventHandlerMap = Map<EventType, EventHandlerList | WildCardEventHandlerList>;\n\nexport interface Emitter {\n\tall: EventHandlerMap;\n\n\ton<T = any>(type: EventType, handler: Handler<T>): void;\n\ton(type: '*', handler: WildcardHandler): void;\n\n\toff<T = any>(type: EventType, handler: Handler<T>): void;\n\toff(type: '*', handler: WildcardHandler): void;\n\n\temit<T = any>(type: EventType, event?: T): void;\n\temit(type: '*', event?: any): void;\n}\n\n/**\n * Mitt: Tiny (~200b) functional event emitter / pubsub.\n * @name mitt\n * @returns {Mitt}\n */\nexport default function mitt(all?: EventHandlerMap): Emitter {\n\tall = all || new Map();\n\n\treturn {\n\n\t\t/**\n\t\t * A Map of event names to registered handler functions.\n\t\t */\n\t\tall,\n\n\t\t/**\n\t\t * Register an event handler for the given type.\n\t\t * @param {string|symbol} type Type of event to listen for, or `\"*\"` for all events\n\t\t * @param {Function} handler Function to call in response to given event\n\t\t * @memberOf mitt\n\t\t */\n\t\ton<T = any>(type: EventType, handler: Handler<T>) {\n\t\t\tconst handlers = all.get(type);\n\t\t\tconst added = handlers && handlers.push(handler);\n\t\t\tif (!added) {\n\t\t\t\tall.set(type, [handler]);\n\t\t\t}\n\t\t},\n\n\t\t/**\n\t\t * Remove an event handler for the given type.\n\t\t * @param {string|symbol} type Type of event to unregister `handler` from, or `\"*\"`\n\t\t * @param {Function} handler Handler function to remove\n\t\t * @memberOf mitt\n\t\t */\n\t\toff<T = any>(type: EventType, handler: Handler<T>) {\n\t\t\tconst handlers = all.get(type);\n\t\t\tif (handlers) {\n\t\t\t\thandlers.splice(handlers.indexOf(handler) >>> 0, 1);\n\t\t\t}\n\t\t},\n\n\t\t/**\n\t\t * Invoke all handlers for the given type.\n\t\t * If present, `\"*\"` handlers are invoked after type-matched handlers.\n\t\t *\n\t\t * Note: Manually firing \"*\" handlers is not supported.\n\t\t *\n\t\t * @param {string|symbol} type The event type to invoke\n\t\t * @param {Any} [evt] Any value (object is recommended and powerful), passed to each handler\n\t\t * @memberOf mitt\n\t\t */\n\t\temit<T = any>(type: EventType, evt: T) {\n\t\t\t((all.get(type) || []) as EventHandlerList).slice().map((handler) => { handler(evt); });\n\t\t\t((all.get('*') || []) as WildCardEventHandlerList).slice().map((handler) => { handler(type, evt); });\n\t\t}\n\t};\n}\n"],"names":["all","Map","on","type","handler","handlers","get","push","set","off","splice","indexOf","emit","evt","slice","map"],"mappings":"6LAgC6BA,GAG5B,MAAO,CAKNA,IAPDA,EAAMA,GAAO,IAAIC,IAehBC,YAAYC,EAAiBC,GAC5B,IAAMC,EAAWL,EAAIM,IAAIH,GACXE,GAAYA,EAASE,KAAKH,IAEvCJ,EAAIQ,IAAIL,EAAM,CAACC,KAUjBK,aAAaN,EAAiBC,GAC7B,IAAMC,EAAWL,EAAIM,IAAIH,GACrBE,GACHA,EAASK,OAAOL,EAASM,QAAQP,KAAa,EAAG,IAcnDQ,cAAcT,EAAiBU,IAC5Bb,EAAIM,IAAIH,IAAS,IAAyBW,QAAQC,IAAI,SAACX,GAAcA,EAAQS,MAC7Eb,EAAIM,IAAI,MAAQ,IAAiCQ,QAAQC,IAAI,SAACX,GAAcA,EAAQD,EAAMU"}

21
vendor/mitt/index.d.ts vendored
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@ -1,21 +0,0 @@
export declare type EventType = string | symbol;
export declare type Handler<T = any> = (event?: T) => void;
export declare type WildcardHandler = (type: EventType, event?: any) => void;
export declare type EventHandlerList = Array<Handler>;
export declare type WildCardEventHandlerList = Array<WildcardHandler>;
export declare type EventHandlerMap = Map<EventType, EventHandlerList | WildCardEventHandlerList>;
export interface Emitter {
all: EventHandlerMap;
on<T = any>(type: EventType, handler: Handler<T>): void;
on(type: '*', handler: WildcardHandler): void;
off<T = any>(type: EventType, handler: Handler<T>): void;
off(type: '*', handler: WildcardHandler): void;
emit<T = any>(type: EventType, event?: T): void;
emit(type: '*', event?: any): void;
}
/**
* Mitt: Tiny (~200b) functional event emitter / pubsub.
* @name mitt
* @returns {Mitt}
*/
export default function mitt(all?: EventHandlerMap): Emitter;

18
vendor/mitt/index.ts vendored Normal file
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@ -0,0 +1,18 @@
/**
* Copyright 2022 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
export * from 'mitt';
export {default as default} from 'mitt';

141
vendor/mitt/package.json vendored
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@ -1,141 +0,0 @@
{
"_from": "mitt@latest",
"_id": "mitt@2.1.0",
"_inBundle": false,
"_integrity": "sha512-ILj2TpLiysu2wkBbWjAmww7TkZb65aiQO+DkVdUTBpBXq+MHYiETENkKFMtsJZX1Lf4pe4QOrTSjIfUwN5lRdg==",
"_location": "/mitt",
"_phantomChildren": {},
"_requested": {
"type": "tag",
"registry": true,
"raw": "mitt@latest",
"name": "mitt",
"escapedName": "mitt",
"rawSpec": "latest",
"saveSpec": null,
"fetchSpec": "latest"
},
"_requiredBy": [
"#USER",
"/"
],
"_resolved": "https://registry.npmjs.org/mitt/-/mitt-2.1.0.tgz",
"_shasum": "f740577c23176c6205b121b2973514eade1b2230",
"_spec": "mitt@latest",
"_where": "/Users/jacktfranklin/src/puppeteer",
"authors": [
"Jason Miller <jason@developit.ca>"
],
"bugs": {
"url": "https://github.com/developit/mitt/issues"
},
"bundleDependencies": false,
"deprecated": false,
"description": "Tiny 200b functional Event Emitter / pubsub.",
"devDependencies": {
"@types/chai": "^4.2.11",
"@types/mocha": "^7.0.2",
"@types/sinon": "^9.0.4",
"@types/sinon-chai": "^3.2.4",
"@typescript-eslint/eslint-plugin": "^3.0.1",
"@typescript-eslint/parser": "^3.0.1",
"chai": "^4.2.0",
"documentation": "^13.0.0",
"eslint": "^7.1.0",
"eslint-config-developit": "^1.2.0",
"esm": "^3.2.25",
"microbundle": "^0.12.3",
"mocha": "^8.0.1",
"npm-run-all": "^4.1.5",
"rimraf": "^3.0.2",
"sinon": "^9.0.2",
"sinon-chai": "^3.5.0",
"ts-node": "^8.10.2",
"typescript": "^3.9.3"
},
"eslintConfig": {
"extends": [
"developit",
"plugin:@typescript-eslint/eslint-recommended",
"plugin:@typescript-eslint/recommended"
],
"parser": "@typescript-eslint/parser",
"parserOptions": {
"sourceType": "module"
},
"env": {
"browser": true,
"mocha": true,
"jest": false,
"es6": true
},
"globals": {
"expect": true
},
"rules": {
"semi": [
2,
"always"
],
"jest/valid-expect": 0,
"@typescript-eslint/no-explicit-any": 0,
"@typescript-eslint/explicit-function-return-type": 0,
"@typescript-eslint/explicit-module-boundary-types": 0,
"@typescript-eslint/no-empty-function": 0
}
},
"eslintIgnore": [
"dist",
"index.d.ts"
],
"esmodules": "dist/mitt.modern.js",
"files": [
"src",
"dist",
"index.d.ts"
],
"homepage": "https://github.com/developit/mitt",
"jsnext:main": "dist/mitt.es.js",
"keywords": [
"events",
"eventemitter",
"emitter",
"pubsub"
],
"license": "MIT",
"main": "dist/mitt.js",
"mocha": {
"extension": [
"ts"
],
"require": [
"ts-node/register",
"esm"
],
"spec": [
"test/*_test.ts"
]
},
"module": "dist/mitt.es.js",
"name": "mitt",
"repository": {
"type": "git",
"url": "git+https://github.com/developit/mitt.git"
},
"scripts": {
"build": "npm-run-all --silent clean -p bundle -s docs",
"bundle": "microbundle",
"clean": "rimraf dist",
"docs": "documentation readme src/index.ts --section API -q --parse-extension ts",
"lint": "eslint src test --ext ts --ext js",
"mocha": "mocha test",
"release": "npm run -s build -s && npm t && git commit -am $npm_package_version && git tag $npm_package_version && git push && git push --tags && npm publish",
"test": "npm-run-all --silent typecheck lint mocha test-types",
"test-types": "tsc test/test-types-compilation.ts --noEmit",
"typecheck": "tsc --noEmit"
},
"source": "src/index.ts",
"typings": "index.d.ts",
"umd:main": "dist/mitt.umd.js",
"version": "2.1.0"
}

92
vendor/mitt/src/index.ts vendored
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@ -1,92 +0,0 @@
/**
* @public
*/
export type EventType = string | symbol;
// An event handler can take an optional event argument
// and should not return a value
/**
* @public
*/
export type Handler<T = any> = (event?: T) => void;
export type WildcardHandler = (type: EventType, event?: any) => void;
// An array of all currently registered event handlers for a type
export type EventHandlerList = Array<Handler>;
export type WildCardEventHandlerList = Array<WildcardHandler>;
// A map of event types and their corresponding event handlers.
export type EventHandlerMap = Map<EventType, EventHandlerList | WildCardEventHandlerList>;
export interface Emitter {
all: EventHandlerMap;
on<T = any>(type: EventType, handler: Handler<T>): void;
on(type: '*', handler: WildcardHandler): void;
off<T = any>(type: EventType, handler: Handler<T>): void;
off(type: '*', handler: WildcardHandler): void;
emit<T = any>(type: EventType, event?: T): void;
emit(type: '*', event?: any): void;
}
/**
* Mitt: Tiny (~200b) functional event emitter / pubsub.
* @name mitt
* @returns {Mitt}
*/
export default function mitt(all?: EventHandlerMap): Emitter {
all = all || new Map();
return {
/**
* A Map of event names to registered handler functions.
*/
all,
/**
* Register an event handler for the given type.
* @param {string|symbol} type Type of event to listen for, or `"*"` for all events
* @param {Function} handler Function to call in response to given event
* @memberOf mitt
*/
on<T = any>(type: EventType, handler: Handler<T>) {
const handlers = all.get(type);
const added = handlers && handlers.push(handler);
if (!added) {
all.set(type, [handler]);
}
},
/**
* Remove an event handler for the given type.
* @param {string|symbol} type Type of event to unregister `handler` from, or `"*"`
* @param {Function} handler Handler function to remove
* @memberOf mitt
*/
off<T = any>(type: EventType, handler: Handler<T>) {
const handlers = all.get(type);
if (handlers) {
handlers.splice(handlers.indexOf(handler) >>> 0, 1);
}
},
/**
* Invoke all handlers for the given type.
* If present, `"*"` handlers are invoked after type-matched handlers.
*
* Note: Manually firing "*" handlers is not supported.
*
* @param {string|symbol} type The event type to invoke
* @param {Any} [evt] Any value (object is recommended and powerful), passed to each handler
* @memberOf mitt
*/
emit<T = any>(type: EventType, evt: T) {
((all.get(type) || []) as EventHandlerList).slice().map((handler) => { handler(evt); });
((all.get('*') || []) as WildCardEventHandlerList).slice().map((handler) => { handler(type, evt); });
}
};
}

9
vendor/tsconfig.cjs.json vendored
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@ -1,12 +1,9 @@
{
"exclude": [
"mitt/dist"
],
"extends": "../tsconfig.base.json",
"compilerOptions": {
"composite": true,
"declarationMap": false,
"outDir": "../lib/cjs/vendor",
"module": "CommonJS",
"moduleResolution": "node",
"strict": false
"sourceMap": false
}
}

12
vendor/tsconfig.esm.json vendored
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@ -1,12 +0,0 @@
{
"exclude": [
"mitt/dist"
],
"compilerOptions": {
"composite": true,
"outDir": "../lib/esm/vendor",
"module": "esnext",
"moduleResolution": "node",
"strict": false
}
}

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vendor/tsconfig.json vendored Normal file
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@ -0,0 +1,9 @@
{
"extends": "../tsconfig.base.json",
"compilerOptions": {
"composite": true,
"declarationMap": false,
"outDir": "../lib/esm/vendor",
"sourceMap": false
}
}