npm package: @maa/monkey-css
Description: Import `.css` files in your Monkey.js project
Latest version: 0.1.1

# Monkey.js + CSS

Import `.css` files in your Monkey.js project

## Installation

```
npm install --save @maa/monkey-css
```

or

```
yarn add @maa/monkey-css
```

## Usage

The stylesheet is compiled to `.next/static/css`. Monkey.js will automatically add the css file to the HTML.
In production a chunk hash is added so that styles are updated when a new version of the stylesheet is deployed.

### Without CSS modules

Create a `next.config.js` in the root of your project (next to pages/ and package.json)

```js
// next.config.js
const withCSS = require('@maa/monkey-css');
module.exports = withCSS({
	/* config options here */
});
```

Create a CSS file `style.css`

```css
.example {
	font-size: 50px;
}
```

Create a page file `pages/index.js`

```js
import '../style.css';

export default () => <div className="example">Hello World!</div>;
```

### With CSS modules

```js
// next.config.js
const withCSS = require('@maa/monkey-css');
module.exports = withCSS({
	cssModules: true
});
```

Create a CSS file `style.css`

```css
.example {
	font-size: 50px;
}
```

Create a page file `pages/index.js`

```js
import css from '../style.css';

export default () => <div className={css.example}>Hello World!</div>;
```

### With CSS modules and options

You can also pass a list of options to the `css-loader` by passing an object called `cssLoaderOptions`.

For instance, [to enable locally scoped CSS modules](https://github.com/css-modules/css-modules/blob/master/docs/local-scope.md#css-modules--local-scope), you can write:

```js
// next.config.js
const withCSS = require('@maa/monkey-css');
module.exports = withCSS({
	cssModules: true,
	cssLoaderOptions: {
		importLoaders: 1,
		localIdentName: '[local]___[hash:base64:5]'
	}
});
```

Create a CSS file `styles.css`

```css
.example {
	font-size: 50px;
}
```

Create a page file `pages/index.js` that imports your stylesheet and uses the hashed class name from the stylesheet

```js
import css from '../style.css';

const Component = props => {
	return <div className={css.example}>...</div>;
};

export default Component;
```

Your exported HTML will then reflect locally scoped CSS class names.

For a list of supported options, [refer to the webpack `css-loader` README](https://github.com/webpack-contrib/css-loader#options).

### PostCSS plugins

Create a `next.config.js` in your project

```js
// next.config.js
const withCSS = require('@maa/monkey-css');
module.exports = withCSS({
	/* config options here */
});
```

Create a `postcss.config.js`

```js
module.exports = {
	plugins: {
		// Illustrational
		'postcss-css-variables': {}
	}
};
```

Create a CSS file `style.css` the CSS here is using the css-variables postcss plugin.

```css
:root {
	--some-color: red;
}

.example {
	/* red */
	color: var(--some-color);
}
```

When `postcss.config.js` is not found `postcss-loader` will not be added and will not cause overhead.

You can also pass a list of options to the `postcss-loader` by passing an object called `postcssLoaderOptions`.

For example, to pass theme env variables to postcss-loader, you can write:

```js
// next.config.js
const withCSS = require('@maa/monkey-css');
module.exports = withCSS({
	postcssLoaderOptions: {
		parser: true,
		config: {
			ctx: {
				theme: JSON.stringify(process.env.REACT_APP_THEME)
			}
		}
	}
});
```

### Configuring Monkey.js

Optionally you can add your custom Monkey.js configuration as parameter

```js
// next.config.js
const withCSS = require('@maa/monkey-css');
module.exports = withCSS({
	webpack(config, options) {
		return config;
	}
});
```