This is a webpack plugin that simplifies creation of HTML files to serve your webpack bundles. This is especially useful for webpack bundles that include a hash in the filename which changes every compilation. You can either let the plugin generate an HTML file for you or supply your own template (using blueimp templates).
Install the plugin with npm:
$ npm install html-webpack-plugin --save-devThe plugin will generate an HTML5 file for you that includes all your webpack
bundles in the body using script tags. Just add the plugin to your webpack
config as follows:
var HtmlWebpackPlugin = require('html-webpack-plugin')
var webpackConfig = {
entry: 'index.js',
output: {
path: 'dist',
filename: 'index_bundle.js'
},
plugins: [new HtmlWebpackPlugin()]
}This will generate a file dist/index.html containing the following:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Webpack App</title>
</head>
<body>
<script src="index_bundle.js"></script>
</body>
</html>If you have multiple webpack entry points, they will all be included with script
tags in the generated HTML.
If you have any css assets in webpack's output (for example, css extracted
with the ExtractTextPlugin)
then these will be included with <link> tags in the HTML head.
You can pass a hash of configuration options to HtmlWebpackPlugin.
Allowed values are as follows:
title: The title to use for the generated HTML document.filename: The file to write the HTML to. Defaults toindex.html. You can specify a subdirectory here too (eg:assets/admin.html).template: A html template (supports blueimp templates).templateContent: A html string or a function returning the html (supports blueimp templates).inject:true | 'head' | 'body' | falseInject all assets into the giventemplateortemplateContent- When passingtrueor'body'all javascript resources will be placed at the bottom of the body element.'head'will place the scripts in the head element.favicon: Adds the given favicon path to the output html.minify:true | {...} | falseSet to true or pass a html-minifier options object to minify the output.hash:true | falseiftruethen append a unique webpack compilation hash to all included scripts and css files. This is useful for cache busting.chunks: Allows you to add only some chunks (e.g. only the unit-test chunk)excludeChunks: Allows you to skip some chunks (e.g. don't add the unit-test chunk)
Here's an example webpack config illustrating how to use these options:
{
entry: 'index.js',
output: {
path: 'dist',
filename: 'index_bundle.js',
hash: true
},
plugins: [
new HtmlWebpackPlugin({
title: 'My App',
filename: 'assets/admin.html'
})
]
}To generate more than one HTML file, declare the plugin more than once in your plugins array:
{
entry: 'index.js',
output: {
path: 'dist',
filename: 'index_bundle.js'
},
plugins: [
new HtmlWebpackPlugin(), // Generates default index.html
new HtmlWebpackPlugin({ // Also generate a test.html
filename: 'test.html',
template: 'src/assets/test.html'
})
]
}If the default generated HTML doesn't meet your needs you can supply
your own template. The easiest way is to use the inject option and pass a custom html file.
The html-webpack-plugin will automatically inject all necessary css, js, manifest
and favicon files into the markup.
plugins: [
new HtmlWebpackPlugin({
title: 'Custom template',
template: 'my-index.html', // Load a custom template
inject: 'body' // Inject all scripts into the body
})
]my-index.html:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8"/>
<title>{%= o.htmlWebpackPlugin.options.title %}</title>
</head>
<body>
</body>
</html>Alternatively, if you already have your template's content in a String, you
can pass it to the plugin using the templateContent option:
plugins: [
new HtmlWebpackPlugin({
inject: true,
templateContent: templateContentString
})
]You can use the blueimp template syntax out of the box.
If the inject feature doesn't fit your needs and you want full control over the asset placement use the default template
as a starting point for writing your own.
The templateContent option can also be a function to use another template language like jade:
plugins: [
new HtmlWebpackPlugin({
templateContent: function(templateParams, compilation) {
// Return your template content synchronously here
return '..';
}
})
]Or the async version:
plugins: [
new HtmlWebpackPlugin({
templateContent: function(templateParams, compilation, callback) {
// Return your template content asynchronously here
callback(null, '..');
}
})
]Note the plugin will throw an error if you specify both template and
templateContent.
The o variable in the template is the data that is passed in when the
template is rendered. This variable has the following attributes:
-
htmlWebpackPlugin: data specific to this plugin-
htmlWebpackPlugin.files: a massaged representation of theassetsByChunkNameattribute of webpack's stats object. It contains a mapping from entry point name to the bundle filename, eg:"htmlWebpackPlugin": { "files": { "css": [ "main.css" ], "js": [ "assets/head_bundle.js", "assets/main_bundle.js"], "chunks": { "head": { "entry": "assets/head_bundle.js", "css": [ "main.css" ] }, "main": { "entry": "assets/main_bundle.js", "css": [] }, } } }
If you've set a publicPath in your webpack config this will be reflected correctly in this assets hash.
-
htmlWebpackPlugin.options: the options hash that was passed to the plugin. In addition to the options actually used by this plugin, you can use this hash to pass arbitrary data through to your template.
-
-
webpack: the webpack stats object. Note that this is the stats object as it was at the time the HTML template was emitted and as such may not have the full set of stats that are available after the wepback run is complete. -
webpackConfig: the webpack configuration that was used for this compilation. This can be used, for example, to get thepublicPath(webpackConfig.output.publicPath).
To include only certain chunks you can limit the chunks being used:
plugins: [
new HtmlWebpackPlugin({
chunks: ['app']
})
]It is also possible to exclude certain chunks by setting the excludeChunks option:
plugins: [
new HtmlWebpackPlugin({
excludeChunks: ['dev-helper']
})
]