Custom parser for ESLint


Project Name babel-eslint Project Url
InceptionYear 2015-02-27 05:30:47 更新时间 2020-02-26 08:13:23
IssueManagement Licenses MIT
仓库地址 git+ 用户数 78
Node Engine >=6 文件大小 9.2 KB
install test test-only lint fix precommit preversion changelog


# babel-eslint [![npm](]( [![travis](]( [![npm-downloads](]( **babel-eslint** allows you to lint **ALL** valid Babel code with the fantastic [ESLint]( ### Why Use babel-eslint You only need to use babel-eslint if you are using types (Flow) or experimental features not supported in ESLint itself yet. Otherwise try the default parser (you don't have to use it just because you are using Babel). --- > If there is an issue, first check if it can be reproduced with the regular parser or with the latest versions of `eslint` and `babel-eslint`! For questions and support please visit the [`#discussion`]( babel slack channel (sign up [here]( or eslint [gitter](! > Note that the `ecmaFeatures` config property may still be required for ESLint to work properly with features not in ECMAScript 5 by default. Examples are `globalReturn` and `modules`). ## Known Issues Flow: > Check out [eslint-plugin-flowtype]( An `eslint` plugin that makes flow type annotations global variables and marks declarations as used. Solves the problem of false positives with `no-undef` and `no-unused-vars`. - `no-undef` for global flow types: `ReactElement`, `ReactClass` [#130]( - Workaround: define types as globals in `.eslintrc` or define types and import them `import type ReactElement from './types'` - `no-unused-vars/no-undef` with Flow declarations (`declare module A {}`) [#132]( Modules/strict mode - `no-unused-vars: [2, {vars: local}]` [#136]( Please check out [eslint-plugin-react]( for React/JSX issues - `no-unused-vars` with jsx Please check out [eslint-plugin-babel]( for other issues ## How does it work? ESLint allows custom parsers. This is great but some of the syntax nodes that Babel supports aren't supported by ESLint. When using this plugin, ESLint is monkeypatched and your code is transformed into code that ESLint can understand. All location info such as line numbers, columns is also retained so you can track down errors with ease. Basically `babel-eslint` exports an [`index.js`](/index.js) that a linter can use. It just needs to export a `parse` method that takes in a string of code and outputs an AST. ## Usage ### Supported ESLint versions ESLint | babel-eslint ------------ | ------------- 4.x | >= 6.x 3.x | >= 6.x 2.x | >= 6.x 1.x | >= 5.x ### Install Ensure that you have substituted the correct version lock for `eslint` and `babel-eslint` into this command: ```sh $ npm install eslint@4.x babel-eslint@8 --save-dev # or $ yarn add eslint@4.x babel-eslint@8 -D ``` ### Setup **.eslintrc** ```json { "parser": "babel-eslint", "rules": { "strict": 0 } } ``` Check out the [ESLint docs]( for all possible rules. ### Configuration - `sourceType` can be set to `'module'`(default) or `'script'` if your code isn't using ECMAScript modules. - `allowImportExportEverywhere` (default `false`) can be set to `true` to allow import and export declarations to appear anywhere a statement is allowed if your build environment supports that. Otherwise import and export declarations can only appear at a program's top level. - `codeFrame` (default `true`) can be set to `false` to disable the code frame in the reporter. This is useful since some eslint formatters don't play well with it. **.eslintrc** ```json { "parser": "babel-eslint", "parserOptions": { "sourceType": "module", "allowImportExportEverywhere": false, "codeFrame": true } } ``` ### Run ```sh $ eslint your-files-here ```


GroupId ArtifactID Version 引用量
Sebastian McKenzie @babel/code-frame 7.10.4 469
Sebastian McKenzie @babel/parser 7.11.5 1461
Sebastian McKenzie @babel/traverse 7.11.5 1187
Sebastian McKenzie @babel/types 7.11.5 1793
Toru Nagashima eslint-visitor-keys 2.0.0 114
James Halliday resolve 1.17.0 5908


GroupId ArtifactID Version 引用量
Sebastian McKenzie babel-eslint 10.1.0 94536
Desmond Brand dedent 0.7.0 356
Nicholas C. Zakas eslint 7.10.0 238059
Sebastian McKenzie eslint-config-babel 9.0.0 94
Gajus Kuizinas eslint-plugin-flowtype 5.1.4 15238
Ben Mosher eslint-plugin-import 2.22.1 104574
Teddy Katz eslint-plugin-prettier 3.1.4 31591
Nicholas C. Zakas espree 7.3.0 460
Typicode husky 4.3.0 56340
Andrey Okonetchnikov lint-staged 10.4.0 36789
James Long prettier 2.1.2 91189