var ExtractTextPlugin = require("extract-text-webpack-plugin");
module.exports = {
module: {
loaders: [
{ test: /\.css$/, loader: ExtractTextPlugin.extract("style-loader", "css-loader") }
]
},
plugins: [
new ExtractTextPlugin("styles.css")
]
}
It moves every require("style.css")
in entry chunks into a separate css output file. So your styles are no longer inlined into the javascript, but separate in a css bundle file (styles.css
). If your total stylesheet volume is big, it will be faster because the stylesheet bundle is loaded in parallel to the javascript bundle.
Advantages:
- Fewer style tags (older IE has a limit)
- CSS SourceMap (with
devtool: "source-map"
andcss-loader?sourceMap
) - CSS requested in parallel
- CSS cached separate
- Faster runtime (less code and DOM operations)
Caveats:
- Additional HTTP request
- Longer compilation time
- More complex configuration
- No runtime public path modification
- No Hot Module Replacement
new ExtractTextPlugin([id: string], filename: string, [options])
id
Unique ident for this plugin instance. (For advanced usage only; by default, automatically generated)filename
the filename of the result file. May contain[name]
,[id]
and[contenthash]
.[name]
the name of the chunk[id]
the number of the chunk[contenthash]
a hash of the content of the extracted file
options
allChunks
extract from all additional chunks too (by default it extracts only from the initial chunk(s))disable
disables the plugin
The ExtractTextPlugin
generates an output file per entry, so you must use [name]
, [id]
or [contenthash]
when using multiple entries.
ExtractTextPlugin.extract([notExtractLoader], loader, [options])
Creates an extracting loader from an existing loader.
notExtractLoader
(optional) the loader(s) that should be used when the css is not extracted (i.e. in an additional chunk whenallChunks: false
)loader
the loader(s) that should be used for converting the resource to a css exporting module.options
publicPath
override thepublicPath
setting for this loader.
There is also an extract
function on the instance. You should use this if you have more than one ExtractTextPlugin.
let ExtractTextPlugin = require('extract-text-webpack-plugin');
// multiple extract instances
let extractCSS = new ExtractTextPlugin('stylesheets/[name].css');
let extractLESS = new ExtractTextPlugin('stylesheets/[name].less');
module.exports = {
...
module: {
loaders: [
{test: /\.scss$/i, loader: extractCSS.extract(['css','sass'])},
{test: /\.less$/i, loader: extractLESS.extract(['css','less'])},
...
]
},
plugins: [
extractCSS,
extractLESS
]
};