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# Webpack

Learn how to include Bootstrap in your project using Webpack 2.

## Installing Bootstrap

Install bootstrap as a node module using npm.

## Importing JavaScript

Import Bootstrap’s JavaScript by adding this line to your app’s entry point (usually `index.js` or `app.js`):

    import 'bootstrap';

Alternatively, you may import plugins individually as needed:

    import 'bootstrap/js/dist/util';
    import 'bootstrap/js/dist/dropdown';
    ...

Bootstrap is dependent on jQuery and Popper, so npm will install them for you if needed. But they must be explicitly provided by webpack. Add the following code to the `plugins` section in your webpack config file:

      plugins: [
        ...
          new webpack.ProvidePlugin({
            $: 'jquery',
            jQuery: 'jquery',
            'window.jQuery': 'jquery',
            Popper: ['popper.js', 'default'],
            // In case you imported plugins individually, you must also require them here:
            Util: "exports-loader?Util!bootstrap/js/dist/util",
            Dropdown: "exports-loader?Dropdown!bootstrap/js/dist/dropdown",
            ...
          })
        ...
      ]

Notice that if you chose to import plugins individually, you must also install exports-loader

## Importing Styles

### Importing Precompiled SASS

To enjoy the full potential of Bootstrap and customize it to your needs, use the source files as a part of your project’s bundling process.

First, create your own `_custom.scss` and use it to override the built-in custom variables. Then, use your main sass file to import your custom variables, followed by Bootstrap:

    @import "custom";
    @import "~bootstrap/scss/bootstrap";

For Bootstrap to compile, make sure you install and use the required loaders: sass-loader, postcss-loader with Autoprefixer. With minimal setup, your webpack config should include this rule or similar:

      ...
      {
        test: /\.(scss)$/,
        use: [{
          loader: 'style-loader', // inject CSS to page
        }, {
          loader: 'css-loader', // translates CSS into CommonJS modules
        }, {
          loader: 'postcss-loader', // Run post css actions
          options: {
            plugins: function () { // post css plugins, can be exported to postcss.config.js
              return [
                require('precss'),
                require('autoprefixer')
              ];
            }
          }
        }, {
          loader: 'sass-loader' // compiles SASS to CSS
        }]
      },
      ...

### Importing Compiled CSS

Alternatively, you may use Bootstrap’s ready-to-use css by simply adding this line to your project’s entry point:

    import 'bootstrap/dist/css/bootstrap.min.css';

In this case you may use your existing rule for `css` without any special modifications to webpack config.