fast-css-loader

Blazingly fast css loader for webpack (about 10 times faster than css-loader when process large css files)

install

1npm install fast-css-loader --save-dev

VS css-loader

fast-css-loader has higher performance when processing large css files, here is an example when process a 24200+ lines css file:

1-------------------------------------
2       CSS_LOADER COST: 1644 ms
3  FAST_CSS_LOADER COST: 116 ms
4-------------------------------------

Why faster?

fast-css-loader rewrites resolving parts of @import and url(...) with RegExp and some tricks, it's extramely faster than postcss used by css-loader.

Limitations

Compare with css-loader, fast-css-loader has these limitations:

• doesn't support sourceMap
• doesn't support minimize (you can minimize css with mini-css-extract-plugin)
• doesn't support camelCase option
• doesn't support css module

If you really need these features, just use original css-loader :)

Usage

just like css-loader:

1module.exports = {
2  module: {
3    rules: [
4      {
5        test: /\.(svg|bmp|gif|png|jpe?g)$/,
6        loader: require.resolve('file-loader'),
7        options: {
8          name: '[name].[hash:8].[ext]'
9        }
10      },
11      {
12        test: /\.css$/,
13        use: [
14          'style-loader',
15          'fast-css-loader'   // replace you css-loader with fast-css-loader
16        ]
17      },
18    ]
19  }
20}

Options

Name	Type	Default	Description
root	{String}	/	Path to resolve URLs, URLs starting with / will not be translated
url	{Boolean}	true	Enable/Disable url() handling
alias	{Object}	{}	Create aliases to import certain modules more easily
import	{Boolean}	true	Enable/Disable @import handling
importLoaders	{Number}	0	Number of loaders applied before CSS loader

The above listed options are consistent with css-loader, for more detail please refer to css-loader options

License

MIT