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141 lines
6.8 KiB
Plaintext
141 lines
6.8 KiB
Plaintext
# eslint-plugin-promise
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Enforce best practices for JavaScript promises.
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[](https://github.com/eslint-community/eslint-plugin-promise/actions/workflows/ci.yml)
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[](https://www.npmjs.com/package/eslint-plugin-promise)
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[](https://github.com/prettier/prettier)
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<!-- START doctoc generated TOC please keep comment here to allow auto update -->
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<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
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- [Installation](#installation)
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- [Usage](#usage)
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- [Rules](#rules)
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- [Maintainers](#maintainers)
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- [License](#license)
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<!-- END doctoc generated TOC please keep comment here to allow auto update -->
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## Installation
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You'll first need to install [ESLint](http://eslint.org):
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```sh
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npm install eslint --save-dev
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```
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Next, install `eslint-plugin-promise`:
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```sh
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npm install eslint-plugin-promise --save-dev
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```
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**Note:** If you installed ESLint globally (using the `-g` flag) then you must
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also install `eslint-plugin-promise` globally.
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## Usage
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Add `promise` to the plugins section of your `.eslintrc.json` configuration
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file. You can omit the `eslint-plugin-` prefix:
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```json
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{
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"plugins": ["promise"]
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}
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```
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Then configure the rules you want to use under the rules section.
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```json
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{
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"rules": {
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"promise/always-return": "error",
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"promise/no-return-wrap": "error",
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"promise/param-names": "error",
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"promise/catch-or-return": "error",
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"promise/no-native": "off",
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"promise/no-nesting": "warn",
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"promise/no-promise-in-callback": "warn",
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"promise/no-callback-in-promise": "warn",
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"promise/avoid-new": "warn",
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"promise/no-new-statics": "error",
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"promise/no-return-in-finally": "warn",
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"promise/valid-params": "warn",
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"promise/no-multiple-resolved": "error"
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}
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}
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```
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or start with the recommended rule set:
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- `eslint.config.js`:
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```js
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import pluginPromise from 'eslint-plugin-promise'
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export default [
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// ...
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pluginPromise.configs['flat/recommended'],
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]
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```
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- `.eslintrc.*`:
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```json
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{
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"extends": ["plugin:promise/recommended"]
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}
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```
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## Rules
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<!-- begin auto-generated rules list -->
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💼 Configurations enabled in.\
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⚠️ Configurations set to warn in.\
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🚫 Configurations disabled in.\
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✅ Set in the `flat/recommended` configuration.\
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✅ Set in the `recommended` configuration.\
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🔧 Automatically fixable by the
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[`--fix` CLI option](https://eslint.org/docs/user-guide/command-line-interface#--fix).
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| Name | Description | 💼 | ⚠️ | 🚫 | 🔧 |
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| :------------------------------------------------------------------- | :----------------------------------------------------------------------------------------- | :-- | :-- | :-- | :-- |
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| [always-return](docs/rules/always-return.md) | Require returning inside each `then()` to create readable and reusable Promise chains. | ✅ | | | |
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| [avoid-new](docs/rules/avoid-new.md) | Disallow creating `new` promises outside of utility libs (use [util.promisify][] instead). | | | ✅ | |
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| [catch-or-return](docs/rules/catch-or-return.md) | Enforce the use of `catch()` on un-returned promises. | ✅ | | | |
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| [no-callback-in-promise](docs/rules/no-callback-in-promise.md) | Disallow calling `cb()` inside of a `then()` (use [util.callbackify][] instead). | | ✅ | | |
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| [no-multiple-resolved](docs/rules/no-multiple-resolved.md) | Disallow creating new promises with paths that resolve multiple times. | | | | |
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| [no-native](docs/rules/no-native.md) | Require creating a `Promise` constructor before using it in an ES5 environment. | | | ✅ | |
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| [no-nesting](docs/rules/no-nesting.md) | Disallow nested `then()` or `catch()` statements. | | ✅ | | |
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| [no-new-statics](docs/rules/no-new-statics.md) | Disallow calling `new` on a Promise static method. | ✅ | | | 🔧 |
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| [no-promise-in-callback](docs/rules/no-promise-in-callback.md) | Disallow using promises inside of callbacks. | | ✅ | | |
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| [no-return-in-finally](docs/rules/no-return-in-finally.md) | Disallow return statements in `finally()`. | | ✅ | | |
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| [no-return-wrap](docs/rules/no-return-wrap.md) | Disallow wrapping values in `Promise.resolve` or `Promise.reject` when not needed. | ✅ | | | |
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| [param-names](docs/rules/param-names.md) | Enforce consistent param names and ordering when creating new promises. | ✅ | | | |
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| [prefer-await-to-callbacks](docs/rules/prefer-await-to-callbacks.md) | Prefer `async`/`await` to the callback pattern. | | | | |
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| [prefer-await-to-then](docs/rules/prefer-await-to-then.md) | Prefer `await` to `then()`/`catch()`/`finally()` for reading Promise values. | | | | |
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| [prefer-catch](docs/rules/prefer-catch.md) | Prefer `catch` to `then(a, b)`/`then(null, b)` for handling errors. | | | | 🔧 |
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| [spec-only](docs/rules/spec-only.md) | Disallow use of non-standard Promise static methods. | | | | |
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| [valid-params](docs/rules/valid-params.md) | Enforces the proper number of arguments are passed to Promise functions. | | ✅ | | |
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<!-- end auto-generated rules list -->
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## Maintainers
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- Jamund Ferguson - [@xjamundx][]
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- Macklin Underdown - [@macklinu][]
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- Aadit M Shah - [@aaditmshah][]
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## License
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- (c) MMXV jden <mailto:jason@denizac.org> - ISC license.
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- (c) 2016 Jamund Ferguson <mailto:jamund@gmail.com> - ISC license.
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[util.callbackify]:
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https://nodejs.org/docs/latest/api/util.html#utilcallbackifyoriginal
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[util.promisify]: https://nodejs.org/api/util.html#util_util_promisify_original
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[@aaditmshah]: https://github.com/aaditmshah
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[@macklinu]: https://github.com/macklinu
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[@xjamundx]: https://github.com/xjamundx
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