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https://github.com/future-architect/eslint-plugin-vue-scoped-css

ESLint plugin for Scoped CSS in Vue.js
https://github.com/future-architect/eslint-plugin-vue-scoped-css

css eslint eslint-plugin npm npm-package scoped-css scss static-analysis stylus vue

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ESLint plugin for Scoped CSS in Vue.js

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# eslint-plugin-vue-scoped-css

[eslint-plugin-vue-scoped-css](https://www.npmjs.com/package/eslint-plugin-vue-scoped-css) is ESLint plugin for [Scoped CSS in Vue.js].

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## Features

This ESLint plugin provides linting rules relate to better ways to help you avoid problems when using [Scoped CSS in Vue.js].

- Provides linting rules for Scoped CSS.
- Supports CSS syntax including level 4 selectors.
- Supports ``.
- Supports `<style lang="stylus">`.
- Parses `<style>`, `<template>` and `<script>` blocks.

You can check on the [Online DEMO](https://future-architect.github.io/eslint-plugin-vue-scoped-css/playground/).

<!--DOCS_IGNORE_START-->

## Documentation

See [documents](https://future-architect.github.io/eslint-plugin-vue-scoped-css/).

## Installation

```bash
npm install --save-dev eslint eslint-plugin-vue-scoped-css vue-eslint-parser
```

> **Requirements**
>
> - ESLint v6.0.0 and above
> - Node.js v12.22.x, v14.17.x, v16.x and above

<!--DOCS_IGNORE_END-->

## Usage

<!--USAGE_SECTION_START-->
<!--USAGE_GUIDE_START-->

### New Config (`eslint.config.js`)

Use `eslint.config.js` file to configure rules. See also: <https://eslint.org/docs/latest/use/configure/configuration-files-new>.

Example **eslint.config.js**:

```js
import eslintPluginVueScopedCSS from 'eslint-plugin-vue-scoped-css';
export default [
// add more generic rule sets here, such as:
// js.configs.recommended,
...eslintPluginVueScopedCSS.configs['flat/recommended'],
{
rules: {
// override/add rules settings here, such as:
// 'vue-scoped-css/no-unused-selector': 'error'
}
}
];
```

### Legacy Config (`.eslintrc`)

Use `.eslintrc.*` file to configure rules. See also: <https://eslint.org/docs/latest/use/configure/>.

Example **.eslintrc.js**:

```js
module.exports = {
extends: [
// add more generic rulesets here, such as:
// 'eslint:recommended',
'plugin:vue-scoped-css/vue3-recommended'
],
rules: {
// override/add rules settings here, such as:
// 'vue-scoped-css/no-unused-selector': 'error'
}
}
```

## Configs

This plugin provides some predefined configs:

### New Config (`eslint.config.js`)

- `*.configs['flat/base']` - Settings and rules to enable this plugin
- `*.configs['flat/recommended']` - `/base`, plus rules for better ways to help you avoid problems for Vue.js 3.x
- `*.configs['flat/vue2-recommended']` - `/base`, plus rules for better ways to help you avoid problems for Vue.js 2.x
- `*.configs['flat/all']` - All rules of this plugin are included

### Legacy Config (`.eslintrc`)

- `plugin:vue-scoped-css/base` - Settings and rules to enable this plugin
- `plugin:vue-scoped-css/recommended` - `/base`, plus rules for better ways to help you avoid problems for Vue.js 2.x
- `plugin:vue-scoped-css/vue3-recommended` - `/base`, plus rules for better ways to help you avoid problems for Vue.js 3.x
- `plugin:vue-scoped-css/all` - All rules of this plugin are included

<!--USAGE_GUIDE_END-->
<!--USAGE_SECTION_END-->

## Rules

<!--RULES_SECTION_START-->

The `--fix` option on the [command line](https://eslint.org/docs/user-guide/command-line-interface#fixing-problems) automatically fixes problems reported by rules which have a wrench :wrench: below.

<!--RULES_TABLE_START-->

## Recommended for Vue.js 3.x

Enforce all the rules in this category with:

```js
export default [
...eslintPluginVueScopedCSS.configs['flat/recommended'],
]
```

or

```json
{
"extends": ["plugin:vue-scoped-css/vue3-recommended"]
}
```

| Rule ID | Description | |
|:--------|:------------|:---|
| [vue-scoped-css/enforce-style-type](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/enforce-style-type.html) | enforce the `<style>` tags to be plain or have the `scoped` or `module` attribute | |
| [vue-scoped-css/no-deprecated-deep-combinator](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-deprecated-deep-combinator.html) | disallow using deprecated deep combinators | :wrench: |
| [vue-scoped-css/no-parent-of-v-global](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-parent-of-v-global.html) | disallow parent selector for `::v-global` pseudo-element | |
| [vue-scoped-css/no-parsing-error](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-parsing-error.html) | disallow parsing errors in `<style>` | |
| [vue-scoped-css/no-unused-keyframes](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-unused-keyframes.html) | disallow `@keyframes` which don't use in Scoped CSS | |
| [vue-scoped-css/no-unused-selector](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-unused-selector.html) | disallow selectors defined in Scoped CSS that don't use in `<template>` | |
| [vue-scoped-css/require-v-deep-argument](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/require-v-deep-argument.html) | require selector argument to be passed to `::v-deep()` | :wrench: |
| [vue-scoped-css/require-v-global-argument](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/require-v-global-argument.html) | require selector argument to be passed to `::v-global()` | |
| [vue-scoped-css/require-v-slotted-argument](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/require-v-slotted-argument.html) | require selector argument to be passed to `::v-slotted()` | |

## Recommended for Vue.js 2.x

Enforce all the rules in this category with:

```js
export default [
...eslintPluginVueScopedCSS.configs['flat/vue2-recommended'],
]
```

or

```json
{
"extends": ["plugin:vue-scoped-css/recommended"]
}
```

| Rule ID | Description | |
|:--------|:------------|:---|
| [vue-scoped-css/enforce-style-type](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/enforce-style-type.html) | enforce the `<style>` tags to be plain or have the `scoped` or `module` attribute | |
| [vue-scoped-css/no-parsing-error](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-parsing-error.html) | disallow parsing errors in `<style>` | |
| [vue-scoped-css/no-unused-keyframes](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-unused-keyframes.html) | disallow `@keyframes` which don't use in Scoped CSS | |
| [vue-scoped-css/no-unused-selector](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-unused-selector.html) | disallow selectors defined in Scoped CSS that don't use in `<template>` | |

## Uncategorized

No preset enables the rules in this category.
Please enable each rule if you want.

For example:

```json
{
"rules": {
"vue-scoped-css/no-deprecated-v-enter-v-leave-class": "error"
}
}
```

| Rule ID | Description | |
|:--------|:------------|:---|
| [vue-scoped-css/no-deprecated-v-enter-v-leave-class](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/no-deprecated-v-enter-v-leave-class.html) | disallow v-enter and v-leave classes. | |
| [vue-scoped-css/require-selector-used-inside](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/require-selector-used-inside.html) | disallow selectors defined that is not used inside `<template>` | |
| [vue-scoped-css/v-deep-pseudo-style](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/v-deep-pseudo-style.html) | enforce `:deep()`/`::v-deep()` style | :wrench: |
| [vue-scoped-css/v-global-pseudo-style](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/v-global-pseudo-style.html) | enforce `:global()`/`::v-global()` style | :wrench: |
| [vue-scoped-css/v-slotted-pseudo-style](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/v-slotted-pseudo-style.html) | enforce `:slotted()`/`::v-slotted()` style | :wrench: |

## Deprecated

- :warning: We're going to remove deprecated rules in the next major release. Please migrate to successor/new rules.
- :innocent: We don't fix bugs which are in deprecated rules since we don't have enough resources.

| Rule ID | Replaced by |
|:--------|:------------|
| [vue-scoped-css/require-scoped](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/require-scoped.html) | [vue-scoped-css/enforce-style-type](https://future-architect.github.io/eslint-plugin-vue-scoped-css/rules/enforce-style-type.html.md) |

<!--RULES_TABLE_END-->
<!--RULES_SECTION_END-->

<!--DOCS_IGNORE_START-->

## Contributing

Welcome contributing!

Please use GitHub's Issues/PRs.

### Development Tools

- `npm test` runs tests and measures coverage.
- `npm run update` runs in order to update readme and recommended configuration.

<!--DOCS_IGNORE_END-->

## License

See the [LICENSE](LICENSE) file for license rights and limitations (MIT).

[Scoped CSS in Vue.js]: https://vue-loader.vuejs.org/guide/scoped-css.html