HTML Webpack Plugin
Asynchronous stylesheets loading withWhy load stylesheets asynchronously?
Referencing CSS stylesheets with link[rel=stylesheet]
or @import
causes browsers to delay page rendering while a stylesheet loads. When loading stylesheets that are not critical to the initial rendering of a page, this blocking behavior is undesirable. The new <link rel="preload">
standard enables us to load stylesheets asynchronously, without blocking rendering.
Install via npm
npm install --save-dev async-stylesheet-webpack-plugin
- Latest release: https://github.com/devpreview/async-stylesheet-webpack-plugin/releases
- NPM: https://www.npmjs.com/package/async-stylesheet-webpack-plugin
Usage
The plugin will update all your webpack
bundles stylesheets in the head using link
tags with rel="preload"
attribute.
Just add the plugin to your webpack
config as follows:
webpack.config.js
const HtmlWebpackPlugin = const AsyncStylesheetWebpackPlugin = ; moduleexports = ... plugins: ...
This will generate a file dist/index.html
containing the following:
Webpack App
Options
You can pass a hash of configuration options to async-stylesheet-webpack-plugin
. Allowed values are as follows:
Name | Type | Default | Description |
---|---|---|---|
preloadPolyfill |
{Boolean} |
false |
If true then enabled legacy browser support |
noscriptFallback |
{Boolean} |
true |
If true then enabled fallback stylesheets loading without JavaScript |
chunks |
{String[]} |
null |
Allows you to async load only some chunks |
excludeChunks |
{String[]} |
null |
Allows you to skip async load some chunks |
Here's an example webpack
config illustrating how to use these options:
webpack.config.js
moduleexports = ... plugins: preloadPolyfill: true noscriptFallback: true ...
Legacy browser support
Preload polyfill
If preloadPolyfill
option is enabled (this option disabled by default) async-stylesheet-webpack-plugin
adding in HTML head
cssrelpreload.js provided by loadCSS.
This will generate a file dist/index.html
containing the following:
Webpack App
Without JavaScript
If noscriptFallback
option is enabled (this option enabled by default) async-stylesheet-webpack-plugin
adding in HTML head
noscript
tag with traditional stylesheet loading.
This will generate a file dist/index.html
containing the following:
Webpack App
If noscriptFallback
option is disabled async-stylesheet-webpack-plugin
only updated link
tags:
Webpack App
Credit
- loadCSS - A function for loading CSS asynchronously;
- HTML Webpack Plugin - Simplifies creation of HTML files to serve your webpack bundles.
See also
- all-chunks-loaded-webpack-plugin - Provide callback executed after all chunks loaded;
- Script Extension for HTML Webpack Plugin - Enhances html-webpack-plugin functionality with different deployment options for your scripts including 'async', 'preload', 'prefetch', 'defer', 'module', custom attributes, and inlining;
- preload-webpack-plugin - A webpack plugin for injecting into HtmlWebpackPlugin pages, with async chunk support.
Need a feature?
Welcome to issues!