A Drupal 8 theme base with Webpack preconfigured for HMR.

When developing locally, I had hit a lot of pain points trying to get webpack-dev-server to successfully proxy an Apache driven site (Acquia Dev Desktop, and Vagrant). Logging in to the site through localhost would redirect to the apache set domain, not setting the cookie on localhost - proxying the dev server with browsersync would fix this problem but cause mixed results.

This theme base should allow you to add Webpack to your existing theme, or start a new one, allowing you to proxy an HTTPS only Drupal 8 site on Apache. It supports hot module replacement with CSS and Vue and includes the basic Drupal yml files to load your dist files, and launch a webpack dev server instance.

• Drupal 8 Theme Libraries
• Webpack 4
• ES6 support with Babel 7
• SASS support with Autoprefixer
• Vue support
• Access to Drupal and drupalSettings within components

│   drupal-8-webpack-hmr.info.yml
│   drupal-8-webpack-hmr.libraries.yml
│   webpack.config.js
│   
└───assets
       ├───dist
       │    ├───css
       │    |     app.css
       │    └───js
       │          app.js
       ├───js
       │     app.js
       └───sass
             app.scss

Use this directory as your theme base, or copy the files to your existing theme.

git clone https://github.com/csymlstd/drupal-8-webpack-hmr.git

npm install

In your webpack.config.js file

• Update the PROXY variable with the full domain to proxy: https://drupal8.dd:8443
• If you are proxying a non-https site, change the devServer https property to false.

In your babel.config.js

• Update targets for the browsers you need to support. Default is IE >= 10, and the last 2 versions of other browsers.

• Update your settings.php to trust localhost and configure local development.

$settings['trusted_host_patterns'] = array(
 '^drupal8\.dd$',
 '^localhost$',
 '^.+\localhost$',
 '^localhost\:8181$',
 '^.+\localhost\:8181$',
);

if (file_exists($app_root . '/' . $site_path . '/settings.local.php')) {
  include $app_root . '/' . $site_path . '/settings.local.php';
}

• Use a settings.local.php file to disable render cache, internal page cache, dynamic page cache.

The default entry file can be found at assets/js/app.js. Include your theme JS here.

There are two predefined scripts in package.json to start your local dev server.

To watch files with hot module replacement:

npm start

The dev server will now be accessible from https://localhost:8181 This will generate files within memory, accessible from https://localhost:8181/themes/drupal-8-webpack-hmr/assets/dist

To build files for production:

npm run build

This will minify all assets and generate files within assets/dist