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@eslint/eslintrc
Advanced tools
The @eslint/eslintrc package is a utility for working with ESLint configuration files. It provides tools to load and parse ESLint configuration files, resolve extends chains, and manage configuration cascading and hierarchy.
Loading ESLint Configuration
This feature allows you to load an ESLint configuration file using the ConfigArrayFactory class. The loaded configuration can then be used to configure the ESLint engine.
const { ConfigArrayFactory } = require('@eslint/eslintrc');
const factory = new ConfigArrayFactory();
const configArray = factory.loadFile('.eslintrc.js');
Parsing Configuration Files
This feature is used to parse ESLint configuration files directly. It is part of the legacy API and allows for direct interaction with configuration files.
const { Legacy: { ConfigFile } } = require('@eslint/eslintrc');
const config = ConfigFile.load('.eslintrc');
Resolving Extends Chains
This feature resolves the 'extends' chains in ESLint configuration files, allowing you to get the final configuration that applies to a specific file, taking into account all the extended configurations.
const { CascadingConfigArrayFactory } = require('@eslint/eslintrc');
const factory = new CascadingConfigArrayFactory();
const configArray = factory.getConfigArrayForFile('some-file.js');
The 'eslint' package is the core linting library that provides the primary functionality for linting JavaScript code. It includes the ability to load and interpret configuration files, which @eslint/eslintrc also does, but as a separate utility focused on configuration management.
The 'eslint-config-prettier' package is an ESLint configuration that disables rules that might conflict with Prettier. While it does not provide utilities for managing configurations, it is an example of a package that extends ESLint's configuration capabilities.
The 'eslint-plugin-import' package is a plugin that provides linting rules related to ES6+ import/export syntax. It extends ESLint's functionality with additional rules, similar to how @eslint/eslintrc extends configuration management capabilities.
This repository contains the legacy ESLintRC configuration file format for ESLint.
Note: This package is not intended for use outside of the ESLint ecosystem. It is ESLint-specific and not intended for use in other programs.
You can install the package as follows:
npm install @eslint/eslintrc --save-dev
# or
yarn add @eslint/eslintrc -D
Note: This package is not intended for public use at this time. The following is an example of how it will be used in the future.
The primary class in this package is FlatCompat
, which is a utility to translate ESLintRC-style configs into flat configs. Here's how you use it inside of your eslint.config.js
file:
import { FlatCompat } from "@eslint/eslintrc";
const compat = new FlatCompat({
baseDirectory: __dirname, // optional; default: process.cwd()
resolvePluginsRelativeTo: __dirname // optional
});
export default [
// mimic ESLintRC-style extends
compat.extends("standard", "example"),
// mimic environments
compat.env({
es2020: true,
node: true
}),
// mimic plugins
compat.plugins("airbnb", "react"),
// translate an entire config
compat.config({
plugins: ["airbnb", "react"],
extends: "standard",
env: {
es2020: true,
node: true
},
rules: {
semi: "error"
}
})
];
MIT License
FAQs
The legacy ESLintRC config file format for ESLint
The npm package @eslint/eslintrc receives a total of 22,990,827 weekly downloads. As such, @eslint/eslintrc popularity was classified as popular.
We found that @eslint/eslintrc demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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