HTML Webpack Plugin

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 lodash templates).

Installation

Install the plugin with npm:

$ npm install html-webpack-plugin --save-dev

Basic Usage

The 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 http-equiv="Content-type" content="text/html; 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.

Configuration

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 to index.html. You can specify a subdirectory here too (eg: assets/admin.html).

Here's an example webpack config illustrating how to use these options:

{
  entry: 'index.js',
  output: {
    path: 'dist',
    filename: 'index_bundle.js'
  },
  plugins: [
    new HtmlWebpackPlugin({
      title: 'My App',
      filename 'assets/admin.html'
    })
  ]
}

Generating Multiple HTML Files

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: fs.readFileSync('src/assets/test.html')
    })
  ]
}

Writing Your Own Templates

If the default generated HTML doesn't meet your needs you can supply your own lodash template. The default template is a good starting point for writing your own.

Let's say for example you wanted to put a webpack bundle into the head of your HTML as well as the body. Your template might look like this:

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-type" content="text/html; charset=utf-8"/>
    <title>My App</title>
    <script src="{%=o.htmlWebpackPlugin.assets.head%}"></script>
  </head>
  <body>
    <script src="{%=o.htmlWebpackPlugin.assets.main%}"></script>
  </body>
</html>

To use this template, configure the plugin like this:

{
  entry: 'index.js',
  output: {
    path: 'dist',
    filename: 'index_bundle.js'
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: fs.readFileSync('src/assets/my_template.html')
    })
  ]
}

Alternatively, if you already have your template's content in a string, you can pass it to the plugin using the template option:

plugins: [
  new HtmlWebpackPlugin({
    template: '<html>...</html>'
  })
]

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