eslint-config-esnext

4.1.0 verified Sat Apr 25 auth: no javascript

Pluggable ESLint config for ECMAScript Next (ES2015+) that you can import, extend and override. Current stable version is 4.1.0. Released infrequently; last release was in 2019. Provides a biased, opinionated set of lint rules favoring code concision and brevity, built on top of eslint:recommended and plugin:import. Uses babel-eslint parser to support all Babel syntax including experimental features like object rest/spread. Supports ES6 modules, CommonJS, and ECMAScript 7. Designed as a superset that you can override. Requires eslint ^6.0.0 as a peer dependency.

Common errors

error Error: Cannot find module 'eslint-config-esnext' ↓

cause ESLint config not installed or not resolved because the package name is not in node_modules.

fix

Run 'npm install --save-dev eslint-config-esnext' in your project root.

error Configuration for rule 'import/no-unresolved' is invalid ↓

cause Plugin eslint-plugin-import may not be installed; it is a dependency of eslint-config-esnext but not automatically installed via npm.

fix

Run 'npm install --save-dev eslint-plugin-import' to install the required plugin.

error Cannot read property 'isEcmaVersion' of undefined ↓

cause Incompatible eslint version (e.g., eslint 7.x) with config that expects eslint ^6.

fix

Downgrade eslint to version ^6.0.0.

Warnings

deprecated babel-eslint is deprecated; use @babel/eslint-parser instead. ↓

fix Replace babel-eslint with @babel/eslint-parser and update parser option to '@babel/eslint-parser'.

breaking Requires eslint ^6.0.0. Not compatible with eslint 7+. ↓

fix Downgrade eslint to version 6.x or use a different config that supports eslint 7+.

gotcha Config uses parser: babel-eslint which may not support the latest ECMAScript proposals. Rules may not be enforced correctly. ↓

fix Consider updating parser manually to @babel/eslint-parser with @babel/eslint-plugin.

gotcha The config is highly opinionated with many rules enabled; may conflict with other configs or project preferences. ↓

fix Override rules in your own .eslintrc after extending.

deprecated ExperimentalObjectRestSpread parser option is deprecated in modern ESLint. ↓

fix Use ecmaVersion: 2021 or later and remove experimentalObjectRestSpread.

Install

npm install eslint-config-esnext

yarn add eslint-config-esnext

pnpm add eslint-config-esnext

Imports

esnext config
wrong
```
extends: ['eslint-config-esnext']
```
correct
```
extends: ['esnext']
```
For shareable configs, you can omit the eslint-config- prefix when extending in ESLint.
.eslintrc file
wrong
```
extends: eslint-config-esnext
```
correct
```
extends:
  - esnext
```
In YAML, use list syntax. In JSON/JS, use an array.

peer dependency

wrong

npm install --save-dev eslint-config-esnext (without eslint)

correct

npm install --save-dev eslint@^6.0.0 eslint-config-esnext

eslint is a peer dependency and must be installed separately. Version ^6.0.0 is required.

Quickstart

Install eslint and eslint-config-esnext, then configure .eslintrc with extends: ['esnext']. Shows basic usage and override.

// Install dependencies:
// npm install --save-dev eslint@^6.0.0 eslint-config-esnext

// .eslintrc.json
{
  "extends": ["esnext"]
}

// .eslintrc.js
module.exports = {
  extends: ['esnext'],
  rules: {
    'no-console': 'off' // override a rule
  }
};