Install

``bash
npm i --save-dev mangle-css-class-webpack-plugin
`

`bash
yarn add --dev mangle-css-class-webpack-plugin
`

The latest version WORKS ONLY with Webpack 5. For Webpack v4 & v3 support, install version 4.x(mangle-css-class-webpack-plugin@4.0.12).




Usage

The plugin will generate optimized class name in HTML, JavaScript, and CSS files.
configure as follows:

webpack.config.js
`js
const MangleCssClassPlugin = require('mangle-css-class-webpack-plugin');

module.exports = {
...
plugins: [
new MangleCssClassPlugin({
classNameRegExp: '[cl]-[a-z][a-zA-Z0-9_]*',
mangleCssVariables: true,
log: true,
}),
],
};
`

This will replace class name matched regex in HTML, JavaScript, CSS files. Identify the class names not to match unexpected words since it replaces all words that are matched with the classNameRegExp.
I suggest that your class names have specific prefix or suffix that identified as a class name.

$3


#### classNameRegExp
e.g. '(abc-|efg-)?[cl]-[a-z][a-zA-Z0-9_]*'
the sample regexp maches l-main, c-textbox, l-main__header, abc-textbox__input, and so on...

If you want to use the back slash \ on the regexp, use [\\\\]* to match class names contained both JS(\\\\) and CSS(\\\\\\\\\\\\\\\\).

#### reserveClassName
The class names won't be used.
e.g.
`js
reserveClassName: ['fa', 'fas', 'far'],
`

#### ignorePrefix
The prefix will be ignored from mangling.
e.g.
`js
classNameRegExp: '(abc-|efg-)?[cl]-[a-z][a-zA-Z0-9_]*',
ignorePrefix: ['abc-', 'efg-'],
`
In this case, abc-c-textbox__input becomes abc-a.

#### ignorePrefixRegExp
Same behavior as ignorePrefix.
e.g.
`js
classNameRegExp: '((hover|focus|xs|md|sm|lg|xl)[\\\\]:)tw-[a-z_-][a-zA-Z0-9_-]*',
ignorePrefixRegExp: '((hover|focus|xs|md|sm|lg|xl)[\\\\]:)',
`
In this case, hover\:xs\:c-textbox__input becomes hover\:xs\:a.

#### classGenerator
Override the default class name generator.

`js
// original: original class name
// opts: options of the plugin
// context: own context of the class generator(initial value is just an empty object)
classGenerator: (original, opts, context) => {
// return custom generated class name.
// Or return undefined if you want to leave it to the original behavior.
}
`

#### mangleCssVariables
When truthy, the plugin will also mangle CSS variables (custom properties) whose name is matching the same classNameRegExp. Disabled by default.

$3


#### Source code
`html

`

`js
// js
document.querySelector('l-efg');
`

`css
// css
.l-abc {
}
.l-abc .l-efg {
}
`

#### Output code

`html




`

`js
// js
document.querySelector('b');
`

`css
// css
.a {
}
.a .b {
}
``