html-bundler-webpack-plugin
Advanced tools
HTML bundler plugin for webpack handels HTML files as entrypoint and extracts CSS, JS, images from their sources loaded in HTML.
This is a modern plugin that does exactly what you want, automatically extracts JS, CSS, images, fonts from their sources loaded directly in HTML using tags and replaces the source filenames with output hashed version of the files. The plugin enable to use an HTML file as entry-point in Webpack.
The purpose of this plugin is to make the developer's life much easier than it was using
html-webpack-plugin mini-css-extract-plugin and other plugins.
💡 Highlights:
<script> and <link> tags.This plugin works like the pug-plugin but the entry point is a HTML
file.
How to easily build a multipage website with this plugin, see the Webpack boilerplate used the html-bundler-webpack-plugin;
Add the HTML files in the Webpack entry:
const HtmlBundlerPlugin = require('html-bundler-webpack-plugin');
module.exports = {
entry: {
// define HTML files here
index: './src/views/home/index.html', // output dist/index.html
},
plugins: [
// enable processing of HTML files defined in Webpack entry
new HtmlBundlerPlugin(),
],
module: {
rules: [
{
test: /.html/,
loader: HtmlBundlerPlugin.loader, // HTML loader
},
// ... other rules, e.g. for styles, images, fonts, etc.
],
},
};
Add source scripts and styles directly to HTML using a relative path or Webpack alias:
<html>
<head>
<link href="./style.scss" rel="stylesheet">
<script src="./main.js" defer="defer"></script>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
The generated HTML contains hashed output CSS and JS filenames:
<html>
<head>
<link href="/assets/css/style.05e4dd86.css" rel="stylesheet">
<script src="/assets/js/main.f4b855d8.js" defer="defer"></script>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
<link> tag<script> tag<link> attributes: href (when type="text/css" or rel="stylesheet") imagesrcset<script> attributes: src<img> attributes: src srcset<source> attributes: src srcset<input> attributes: src when type="image"<audio> attributes: src<track> attributes: src<video> attributes: srcauto publicPathasset/resource asset/inline assetinline CSS in HTMLinline JavaScript in HTMLinline image as base64 encoded data-URL for PNG, JPG, etc. in HTML and CSSinline SVG as SVG tag in HTMLinline SVG as utf-8 data-URL in CSS
background: url('./icons/iphone.svg') // CSS: url("data:image/svg+xml,<svg>...</svg>")
Just one HTML bundler plugin replaces the functionality of the plugins and loaders:
| Package | Features |
|---|---|
| html-webpack-plugin | extract HTML and save in a file |
| mini-css-extract-plugin | extract CSS and save in a file |
| webpack-remove-empty-scripts | remove empty JS files generated by the mini-css-extract-plugin |
| html-loader | exports HTML as string |
| style-loader | inject CSS into the DOM |
| resolve-url-loader | resolve relative url in CSS |
| svg-url-loader | encode SVG data-URL as utf8 |
| posthtml-inline-svg | inline SVG icons in HTML |
Install the html-bundler-webpack-plugin:
npm install html-bundler-webpack-plugin --save-dev
Install additional packages for styles:
npm install css-loader sass sass-loader --save-dev
Change your webpack.config.js according to the following minimal configuration:
const path = require('path');
const HtmlBundlerPlugin = require('html-bundler-webpack-plugin');
module.exports = {
output: {
path: path.join(__dirname, 'dist/'),
publicPath: '/',
},
entry: {
// define HTML files here
index: './src/views/home/index.html', // output dist/index.html
'pages/about': './src/views/about/index.html', // output dist/pages/about.html
// ...
},
plugins: [
new HtmlBundlerPlugin({
js: {
// output filename of extracted JS from source script loaded in HTML via `<script>` tag
filename: 'assets/js/[name].[contenthash:8].js',
},
css: {
// output filename of extracted CSS from source style loaded in HTML via `<link>` tag
filename: 'assets/css/[name].[contenthash:8].css',
},
}),
],
module: {
rules: [
{
test: /\.html$/,
loader: HtmlBundlerPlugin.loader, // HTML loader
},
{
test: /\.(css|sass|scss)$/,
use: ['css-loader', 'sass-loader'],
},
],
},
};
verboseType: boolean Default: false
Display information about extracted files.
testType: RegExp Default: /\.html$/
The test option allows то handel only those entry points that match their source filename.
For example, if you has *.html and *.hbs entry points, then you can set the option to match all needed files: test: /\.(html|hbs)$/.
outputPathType: string Default: webpack.options.output.path
The output directory for processed file. This directory can be relative by webpack.options.output.path or absolute.
filenameType: string | Function Default: [name].html
The name of output file.
string then following substitutions (see output.filename for chunk-level) are available in template string:
[id] The ID of the chunk.[name] Only filename without extension or path.[contenthash] The hash of the content.[contenthash:nn] The nn is the length of hashes (defaults to 20).Function then following arguments are available in the function:
@param {PathData} pathData has the useful properties (see the type PathData):
pathData.filename the full path to source filepathData.chunk.name the name of entry key@param {AssetInfo} assetInfo Mostly this object is empty.@return {string} The name or template string of output file.cssType: Object
Default properties:
{
test: /\.(css|scss|sass|less|styl)$/,
verbose: false,
filename: '[name].css',
outputPath: null,
}
The filename property see by filename option.
The outputPath property see by outputPath option.
The option to extract CSS from a style source file loaded in the HTML tag:
<link href="./style.scss" rel="stylesheet">
Warning
Don't import source styles in JavaScript! Styles must be loaded directly in HTML.
The default CSS output filename is [name].css.
You can specify your own filename using webpack filename substitutions:
const HtmlBundlerPlugin = require('html-bundler-webpack-plugin');
module.exports = {
plugins: [
new HtmlBundlerPlugin({
css: {
filename: 'assets/css/[name].[contenthash:8].css',
},
}),
],
};
The [name] is the base filename of a loaded style.
For example, if source file is style.scss, then output filename will be assets/css/style.1234abcd.css.
If you want to have a different output filename, you can use the filename options as the function.
Warning
Don't use
mini-css-extract-pluginorstyle-loader, they are not required more.
Thehtml-bundler-webpack-pluginextracts CSS much faster than other plugins and resolves all asset URLs in CSS, therefore theresolve-url-loaderis redundant too.
jsType: Object
Default properties:
{
verbose: false,
filename: '[name].js',
outputPath: null,
}
The filename property see by filename option.
The outputPath property see by outputPath option.
The test property not exist because all JS files loaded in <script> tag are automatically detected.
The option to extract JS from a script source file loaded in the HTML tag:
<script src="./main.js"></script>
The default JS output filename is [name].js.
You can specify your own filename using webpack filename substitutions:
const HtmlBundlerPlugin = require('html-bundler-webpack-plugin');
module.exports = {
plugins: [
new HtmlBundlerPlugin({
js: {
filename: 'assets/js/[name].[contenthash:8].js',
},
}),
],
};
The [name] is the base filename script.
For example, if source file is main.js, then output filename will be assets/js/main.1234abcd.js.
If you want to have a different output filename, you can use the filename options as the function.
preprocessorType:
type preprocessor = (
content: string,
loaderContext: LoaderContext
) => HTMLElement;
Default: undefined
The content argument is raw content of a file.
The loaderContext argument is an object contained useful properties, e.g.:
mode - the Webpack mode: production, development, nonerootContext - the path to Webpack contextresource - the template fileComplete API see by the Loader Context.
The preprocessor is called before handling of the content. This function can be used to replace a placeholder with a variable or compile the content with a template engine, e.g. Handlebars.
For example, set variable in the template index.html
<html>
<head>
<title>{{title}}</title>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
Webpack config
const path = require('path');
const HtmlBundlerPlugin = require('html-bundler-webpack-plugin');
module.exports = {
output: {
path: path.join(__dirname, 'dist/'),
},
entry: {
index: './src/index.html',
},
plugins: [new HtmlBundlerPlugin()],
module: {
rules: [
{
test: /\.html$/,
loader: HtmlBundlerPlugin.loader,
options: {
preprocessor: (content, loaderContext) => content.replace('{{title}}', 'Homepage'),
},
},
],
},
};
Note
The
preprocessorwill be called for each entry file. For multipage configuration, you can use theloaderContext.resourceproperty to differentiate data for diverse pages. See the usage example.
Add to Webpack config the rule:
module: {
rules: [
{
test: /\.(png|jpe?g|ico)/,
type: 'asset/resource',
generator: {
filename: 'assets/img/[name].[hash:8][ext]',
},
},
],
}
Add a source file using a relative path or Webpack alias in HTML:
<html>
<head>
<link href="./favicon.ico" rel="icon" />
</head>
<body>
<img src="./apple.png" srcset="./apple1.png 320w, ./apple2.png 640w" alt="apple">
<picture>
<source srcset="./fig1.jpg, ./fig2.jpg 320w, ./fig3.jpg 640w">
</picture>
</body>
</html>
The generated HTML contains hashed output images filenames:
<html>
<head>
<link href="/assets/img/favicon.05e4dd86.ico" rel="icon" />
</head>
<body>
<img src="/assets/img/apple.f4b855d8.png" srcset="/assets/img/apple1.855f4bd8.png 320w, /assets/img/apple2.d8f4b855.png 640w" alt="apple">
<picture>
<source srcset="/assets/img/fig1.605e4dd8.jpg, /assets/img/fig2.8605e4dd.jpg 320w, /assets/img/fig3.e4605dd8.jpg 640w">
</picture>
</body>
</html>
Add to Webpack config the rule:
module: {
rules: [
{
test: /\.(eot|ttf|woff|woff2)/,
type: 'asset/resource',
generator: {
filename: 'assets/fonts/[name][ext]',
},
},
],
}
Add a source file using a relative path or Webpack alias in HTML:
<html>
<head>
<link href="./font1.woff2" rel="preload" as="font" type="font/woff2" />
<link href="./font2.woff2" rel="preload" as="font" type="font/woff2" />
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
The generated HTML contains output fonts filenames:
<html>
<head>
<link href="/assets/fonts/font1.woff2" rel="preload" as="font" type="font/woff2" />
<link href="/assets/fonts/font2.woff2" rel="preload" as="font" type="font/woff2" />
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
Note
You don't need a plugin to copy files from source directory to public.
For example, the style.scss:
$color: red;
h1 {
color: $color;
}
Add the ?inline query to the source filename which you want to inline:
<html>
<head>
<!-- load style as file -->
<link href="./main.scss" rel="stylesheet" />
<!-- inline style -->
<link href="./style.scss?inline" rel="stylesheet" />
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
The generated HTML contains inline CSS already processed via Webpack:
<html>
<head>
<!-- load style as file -->
<link href="/assets/css/main.05e4dd86.css" rel="stylesheet">
<!-- inline style -->
<style>
h1{color: red;}
</style>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
Note
To enable source map in inline CSS set the Webpack option
devtool.
For example, the script.js:
console.log('Hello JS!');
Add the ?inline query to the source filename which you want to inline:
<html>
<head>
<!-- load script as file -->
<script src="./main.js" defer="defer"></script>
<!-- inline script -->
<script src="./script.js?inline"></script>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
The generated HTML contains inline JS already compiled via Webpack:
<html>
<head>
<!-- load style as file -->
<script src="assets/js/main.992ba657.js" defer="defer"></script>
<!-- inline script -->
<script>
(()=>{"use strict";console.log("Hello JS!")})();
</script>
</head>
<body>
<h1>Hello World!</h1>
</body>
</html>
Note
If Webpack is started as
serveorwatch, the inlined JS code will contain additional HMR code. Don't worry it is ok, so works Webpacklive reload.To enable source map in inline JS set the Webpack option
devtool.
You can inline images in two ways:
?inline queryAdd to Webpack config the rule:
module: {
rules: [
{
test: /\.(png|jpe?g|svg|webp|ico)$/i,
oneOf: [
// inline image using `?inline` query
{
resourceQuery: /inline/,
type: 'asset/inline',
},
// auto inline by image size
{
type: 'asset',
parser: {
dataUrlCondition: {
maxSize: 1024,
},
},
generator: {
filename: 'assets/img/[name].[hash:8][ext]',
},
},
],
},
],
}
For example, using the Handlebars templating engine, there is an index.hbs
<html>
<head>
<title>{{title}}</title>
</head>
<body>
<h1>{{headline}}</h1>
<div>
<p>{{firstname}} {{lastname}}</p>
</div>
</body>
</html>
Add the preprocessor option to compile the content with Handlebars.
const path = require('path');
const HtmlBundlerPlugin = require('html-bundler-webpack-plugin');
const Handlebars = require('handlebars');
module.exports = {
output: {
path: path.join(__dirname, 'dist/'),
},
entry: {
index: './src/views/home/index.hbs',
},
plugins: [
new HtmlBundlerPlugin({
test: /\.hbs$/, // add the option to match *.hbs files in entry, default is /\.html$/
}),
],
module: {
rules: [
{
test: /\.hbs$/, // must match the files specified in the entry
loader: HtmlBundlerPlugin.loader,
options: {
// add the preprocessor function to compile *.hbs files to HTML
// you can pass data here to all templates
preprocessor: (content, loaderContext) =>
Handlebars.compile(content)({
title: 'My Title',
headline: 'Breaking Bad',
firstname: 'Walter',
lastname: 'Heisenberg',
}),
},
},
],
},
};
You can pass variables into template using a template engine, e.g. Handlebars. See the usage example by How to use a template engine or How to pass different data in multipage configuration.
For example, you have several pages with variables:
one file has .html extension, first.html
<html>
<head>
<title>{{title}}</title>
<link href="./first.scss" rel="stylesheet">
<script src="./first.js" defer="defer"></script>
</head>
<body>
<h1>{{headline}}</h1>
<div>
<p>{{firstname}} {{lastname}}</p>
</div>
</body>
</html>
other file has .hbs extension, second.hbs
<html>
<head>
<title>{{title}}</title>
<link href="./second.scss" rel="stylesheet">
<script src="./second.js" defer="defer"></script>
</head>
<body>
<h1>Location</h1>
<div>
<p>{{city}}, {{state}}</p>
<img src="./map.png" alt="map" />
</div>
</body>
</html>
Webpack config for multipage
const path = require('path');
const HtmlBundlerPlugin = require('html-bundler-webpack-plugin');
const Handlebars = require('handlebars');
/**
* Find template data by template file.
*
* @param {string} sourceFile
* @param {Object} data
* @return {Object}
*/
const findData = (sourceFile, data) => {
for (const [key, value] of Object.entries(data)) {
if (sourceFile.endsWith(key)) return value;
}
return {};
};
// define template data using a template filename as key
const entryData = {
'src/first.html': {
title: 'First page',
headline: 'Breaking Bad',
firstname: 'Walter',
lastname: 'Heisenberg',
},
'src/second.hbs': {
title: 'Second page',
city: 'Albuquerque',
state: 'New Mexico',
},
};
module.exports = {
output: {
path: path.join(__dirname, 'dist/'),
},
entry: {
// define your templates here
first: './src/first.html', // => dist/first.html
'route/to/second': './src/second.hbs', // => dist/route/to/second.html
},
plugins: [
new HtmlBundlerPlugin({
test: /\.(html|hbs)$/, // match all template files
js: {
filename: 'assets/js/[name].[contenthash:8].js',
},
css: {
filename: 'assets/css/[name].[contenthash:8].css',
},
}),
],
module: {
rules: [
// templates
{
test: /\.(html|hbs)/,
loader: HtmlBundlerPlugin.loader,
options: {
// the deconstucted 'resource' argument is the template name
preprocessor: (content, { resource }) => {
// get template variables by template filename
const data = findData(resource, entryData);
// compile template with specific variables
return Handlebars.compile(content)(data);
},
},
},
// images
{
test: /\.(png|svg|jpe?g|webp)$/i,
type: 'asset/resource',
generator: {
filename: 'assets/img/[name].[hash:8][ext]',
},
},
],
},
};
The generated dist/first.html
<html>
<head>
<title>First page</title>
<link href="/assets/css/first.05e4dd86.css" rel="stylesheet">
<script src="/assets/js/first.f4b855d8.js" defer="defer"></script>
</head>
<body>
<h1>Breaking Bad</h1>
<div>
<p>Walter Heisenberg</p>
</div>
</body>
</html>
The generated dist/route/to/second.html
<html>
<head>
<title>Second page</title>
<link href="/assets/css/second.d8605e4d.css" rel="stylesheet">
<script src="/assets/js/second.5d8f4b85.js" defer="defer"></script>
</head>
<body>
<h1>Location</h1>
<div>
<p>Albuquerque, New Mexico</p>
<img src="assets/img/map.697ef306.png" alt="map" />
</div>
</body>
</html>
To enable live reload by changes any file add in the Webpack config the devServer option:
module.exports = {
// enable HMR with live reload
devServer: {
static: {
directory: path.join(__dirname, 'dist'),
},
watchFiles: {
paths: ['src/**/*.*'],
options: {
usePolling: true,
},
},
},
};
Note
Live reload works only if in HTML used a JS file. This is specific of Webpack. If your HTML has not a JS, then create one empty JS file, e.g.
hmr.jsand add it in the HTML:<script src="./hmr.js"></script>
0.5.0 (2023-01-22)
test plugin option to process entry files that pass test assertionpreprocessor loader option to allow pre-processing of content before handlingHandlebars template engineFAQs
Generates complete single-page or multi-page website from source assets. Build-in support for Markdown, Eta, EJS, Handlebars, Nunjucks, Pug. Alternative to html-webpack-plugin.
The npm package html-bundler-webpack-plugin receives a total of 2,411 weekly downloads. As such, html-bundler-webpack-plugin popularity was classified as popular.
We found that html-bundler-webpack-plugin demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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