npm package: @filiphsandstrom/next-purge-css-modules
Description: Easily remove unused css-module code in your Next.js application
Author: Liam Howell
Latest version: 0.0.0-unstable.1

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    <div>:construction_worker:</div>
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    <div>next-purge-css-modules</div>
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  <div>Easily remove unused css-module code in your <a href="https://github.com/vercel/next.js">Next.js</a> application</div>
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  <a href="https://www.npmjs.com/package/next-purge-css-modules"><img src="https://img.shields.io/npm/v/next-purge-css-modules?style=flat-square" /></a>
  <a href="https://coveralls.io/github/eels/next-purge-css-modules"><img src="https://img.shields.io/coveralls/github/eels/next-purge-css-modules?label=Coverage&style=flat-square" /></a>
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  <pre>yarn add <a href="https://www.npmjs.com/package/next-purge-css-modules">next-purge-css-modules</a> --dev</pre>
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## Contents

- [Installation](#installation)
- [Example Usage](#example-usage)
- [Configuration](#configuration)
- [Usage With Sass](#usage-with-sass)
- [Contributing](#contributing)
- [License](#license)

## Installation

`next-purge-css-modules` can be installed using your favourite JavaScript package manager.

```bash
yarn add next-purge-css-modules --dev
```

```bash
npm install next-purge-css-modules --save-dev
```

## Example Usage

If your Next.js project does not already contain one, create a `next.config.js` file in the root of your project directory.

```js
const withPurgeCSSModules = require('next-purge-css-modules');

/** @type {import('next-purge-css-modules').PurgeConfig} */
const purgeConfig = { ... };

module.exports = withPurgeCSSModules(purgeConfig);
```

You can read more about the advanced configuration of Next.js on the [official documentation site](https://nextjs.org/docs/api-reference/next.config.js/introduction).

## Configuration

This plugin comes preconfigured with some sensible defaults options. However, you are free to alter this configuration to suit your project needs with the use of the custom purge config object via the `next.config.js` file.

Additionally, you can also pass your custom next config object as the function's second argument.

```ts
interface PurgeCSSModulesOptions {
  content?: string | string[];
  enableDevPurge?: boolean;
  fontFace?: boolean;
  keyframes?: boolean;
  safelist?: UserDefinedSafelist;
  variables?: boolean;
}
```

```js
const path = require('path');
const withPurgeCSSModules = require('next-purge-css-modules');

/** @type {import('next').NextConfig} */
const nextConfig = {
  ...
};

/** @type {import('next-purge-css-modules').PurgeConfig} */
const purgeConfig = {
  content: path.join(__dirname, 'src/**/*.{js,jsx,ts,tsx}'),
  enableDevPurge: true,
  safelist: ['body', 'html'],
};

module.exports = withPurgeCSSModules(purgeConfig, nextConfig);
```

### `content`

This option tells `next-purge-css-modules` which files to look through to check for unused css-modules. You can either supply these files as absolute paths or as file path globs and they can either be a single path or an array.

The default value looks at all JavaScript/TypeScript files in the default Next.js pages directories (`app/**/*.{js,jsx,ts,tsx}`, `pages/**/*.{js,jsx,ts,tsx}`, `src/app/**/*.{js,jsx,ts,tsx}` and `src/pages/**/*.{js,jsx,ts,tsx}`).

### `enableDevPurge`

By default, your css-module code will only be purged when a `production` build is generated. You can set this flag to `true` to enable css-modules purging when running your Next.js project in `development` mode.

### `fontFace`

If there are any unused @font-face rules, setting this flag to `true` will purge them from the final output. By default is `false`.

### `keyframes`

Any unused animation keyframes found within your css-module code will be purged from the final output when this flag is set to `true`. By default is `false`.

### `safelist`

By supplying an array of CSS selectors to the `safelist` option, you can tell `next-purge-css-modules` which selectors you wish to ensure are not purged. By default is `['body', 'html']`

To read more about the `safelist` configuration option, you can refer to the official [PurgeCSS documentation](https://purgecss.com/configuration.html).

### `variables`

When you are using Custom Properties (CSS variables), or a library using them such as Bootstrap, setting this flag to `true` will purge them from the final output.

## Usage With Sass

`next-purge-css-modules` works directly out of the box with Next.js projects set up to use Sass.

You can refer to the [official Next.js Sass documentation](https://nextjs.org/docs/basic-features/built-in-css-support#sass-support) to ensure your project is set up correctly.

## Contributing

Thanks for taking the time to contribute! Before you get started, please take a moment to read through our [contributing guide](https://github.com/eels/next-purge-css-modules/blob/main/.github/CONTRIBUTING.md). The focus area for `next-purge-css-modules` right now is fixing potential bugs.

However, all issues and PRs are welcome!

## License

MIT - see the [LICENSE.md](https://github.com/eels/next-purge-css-modules/blob/main/LICENSE.md) file for details