This is a plugin for WebPack that utilizes PurifyCSS to clean your CSS. Its dead simple, but it requires you to be prepared.

So, let's go and clean some style!

• WebPack must be already installed, so that this plugin can use it's library parts.
• You should use the extract-text-webpack-plugin - although, you are not enforced to. Without any CSS file being emitted as an asset, this plugin will not do a thing except idle about inside the compiler. You can also use the file plugin to drop a special CSS file into your output folder, but I highly recommend the extract plugin.

First, get it:

npm install --save bird3-purifycss-webpack-plugin

Let's assume you have a basic webpack configuration like so:

var extractor = require("extract-text-webpack-plugin");
module.exports = {
    entry: "app.js",
    output: {
        // ...
    },
    module: {
        loaders: [
            { test: /\.css$/, loader: extractor.loader("style","css") }
        ]
    },
    plugins: [
        new extractor("[name].css")
    ]
}

Now, all we add, is another plugin definition. Please note: Plugins seem to be executed in order, so make sure that this plugin comes after the extract plugin, if you use it.

var extractor = require("extract-text-webpack-plugin");
var purify = require("bird3-purifycss-webpack-plugin");
module.exports = {
    entry: "app.js",
    output: {
        // ...
    },
    module: {
        loaders: [
            { test: /\.css$/, loader: extractor.loader("style","css") }
        ]
    },
    plugins: [
        new extractor("[name].css"),
        new purify({
            basePath: __dirname,
            paths: [
                "app/views/*.html",
                "app/layout/*.html"
            ]
        })
    ]
}

And, that's it! Your scripts and view files will be scanned for classes, and those that are unused will be stripped off your CSS - aka. "purified".

This plugin, unlike the original PurifyCSS plugin, provides special features, such as scanning the dependency files and all kinds of files. To configure such behaviours, I will show you the options.

This plugin is NOT a fork of the offical plugin! Instead, this is it's own. I prefixed it with bird3, since it was created within my BIRD3 project and to make an obvious separation to the offical version.