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eslint-rules/packages/eslint-define-config/README.md
2024-04-19 21:42:48 -04:00

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# eslint-define-config
Provide a `defineConfig` function for `.eslintrc.js`, and a `defineFlatConfig` function for `eslint.config.js` files.
> This project is written by a human and only partially automatically generated!
> Some rules are even enhanced by hand!
> Unfortunately, this has the disadvantage that not everything is immediately defined. For example, if a rule is not defined, it falls back to a basic definition.
> However, the advantage is that you get documentation for pretty much everything in the code and usually get a direct link to the respective plugin or eslint rule. The types are also strictly typed.
>
> So if you are missing something like a rule or a plugin that should also be supported or a rule definition is e.g. out of date, feel free to open an issue or PR for it.
# Installation
```bash
# add eslint and eslint-define-config to projects dev dependencies
npm add --save-dev eslint eslint-define-config
# or
yarn add --dev eslint eslint-define-config
# or
pnpm add --save-dev eslint eslint-define-config
```
# Usage
`.eslintrc.js`
```ts
// @ts-check
// To activate auto-suggestions for Rules of specific plugins, you need to add a `/// <reference types="eslint-plugin-PLUGIN_NAME/define-config-support" />` comment.
// ⚠️ This feature is very new and requires the support of the respective plugin owners.
/// <reference types="@typescript-eslint/eslint-plugin/define-config-support" />
const { defineConfig } = require('eslint-define-config');
module.exports = defineConfig({
root: true,
rules: {
// rules...
},
});
```
## Flat Config
`eslint.config.js`
```ts
// @ts-check
const { defineFlatConfig } = require('eslint-define-config');
module.exports = defineFlatConfig([
'eslint:recommended',
{
plugins: {
// plugins...
},
rules: {
// rules...
},
},
]);
```
# Why?
Improve your eslint configuration experience with:
- auto-suggestions
- type checking (Use `// @ts-check` at the first line in your `.eslintrc.js` or `eslint.config.js`)
- documentation
- deprecation warnings
<img src="https://user-images.githubusercontent.com/7195563/112484789-8a416480-8d7a-11eb-9337-d8b5bc16de17.png" alt="Image" width="600px"/>
## Video
_Click on the thumbnail to play the video_
<a href="https://user-images.githubusercontent.com/7195563/112726158-4a19e780-8f1c-11eb-8cc6-4ea6c100137f.mp4" target="_blank">
<img src="https://user-images.githubusercontent.com/7195563/112726343-30c56b00-8f1d-11eb-9b92-260c530caf1b.png" alt="Video" width="600px"/>
</a>
## Want to support your own plugin?
:warning: **This feature is very new and requires the support of the respective plugin owners**
Add a `declare module` to your plugin package like this:
```ts
declare module 'eslint-define-config' {
export interface CustomRuleOptions {
/**
* Require consistently using either `T[]` or `Array<T>` for arrays.
*
* @see [array-type](https://typescript-eslint.io/rules/array-type)
*/
'@typescript-eslint/array-type': [
{
default?: 'array' | 'generic' | 'array-simple';
readonly?: 'array' | 'generic' | 'array-simple';
},
];
// ... more Rules
}
}
```
There are other interfaces that can be extended.
- `CustomExtends`
- `CustomParserOptions`
- `CustomParsers`
- `CustomPlugins`
- `CustomSettings`
# Credits
- [Proposal Idea](https://github.com/eslint/eslint/issues/14249)
- [Vite](https://github.com/vitejs/vite) and [Evan You](https://github.com/yyx990803) for the idea
- [@antfu](https://github.com/antfu) and his [tweet](https://twitter.com/antfu7/status/1365907188338753536)