Sass versions of Bootstrap 4 and Fontawesome 5 with Elixir / Phoenix Framework 1.3.x and 1.4.x using Webpack

_custom.scss

/* Boostrap overrides */

$primary: #F92653;

/* Fontawesome 5 config */

$fa-font-path: "~@fortawesome/fontawesome-free/webfonts"

_Webpack-Fontawesome-Bootstrap-Phoenix.md

SASS Versions of

• Fontawesome 5
• Bootstrap 4

in Phoenix 1.3 and 1.4 via Webpack

app.js

// We need to import the CSS so that webpack will load it.
// The MiniCssExtractPlugin is used to separate it out into
// its own CSS file.
import css from "../css/app.scss"

// webpack automatically bundles all modules in your
// entry points. Those entry points can be configured
// in "webpack.config.js".
//
// Import dependencies
//
import "phoenix_html"

// Import local files
//
// Local files can be imported directly using relative
// paths "./socket" or full ones "web/static/js/socket".

// import socket from "./socket"

app.scss

/* This file is for your main application css. */

@import "custom";
@import "~bootstrap/scss/bootstrap";
@import "~@fortawesome/fontawesome-free/scss/fontawesome";
@import "~@fortawesome/fontawesome-free/scss/fa-brands";
@import "~@fortawesome/fontawesome-free/scss/fa-solid";
@import "~@fortawesome/fontawesome-free/scss/fa-regular";

dev.exs

...

# The watchers configuration can be used to run external
# watchers to your application. For example, we use it
# with webpack to recompile .js and .css sources.
config :hello, HelloWeb.Endpoint,
  ...
  watchers: [node: ["node_modules/webpack/bin/webpack.js", "--mode", "development", "--watch-stdin",
                    cd: Path.expand("../assets", __DIR__)]]
 
 ...

package.json

{
  "repository": {},
  "license": "MIT",
  "scripts": {
    "deploy": "webpack --mode production",
    "watch": "webpack --mode development --watch"
  },
  "dependencies": {
    "phoenix": "file:../deps/phoenix",
    "phoenix_html": "file:../deps/phoenix_html"
  },
  "devDependencies": {
    "@fortawesome/fontawesome-free": "^5.1.0",
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.3",
    "babel-preset-env": "^1.6.1",
    "bootstrap": "4.1.1",
    "copy-webpack-plugin": "^4.5.0",
    "css-loader": "^0.28.11",
    "file-loader": "^1.1.11",
    "jquery": "^3.3.1",
    "mini-css-extract-plugin": "^0.4.0",
    "node-sass": "^4.9.0",
    "optimize-css-assets-webpack-plugin": "^4.0.0",
    "popper.js": "^1.14.3",
    "postcss-loader": "^2.1.5",
    "sass-loader": "^7.0.3",
    "uglifyjs-webpack-plugin": "^1.2.4",
    "webpack": "4.4.0",
    "webpack-cli": "^2.0.10"
  }
}

webpack.config.js

const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = (env, options) => ({
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        cache: true,
        parallel: true,
        sourceMap: false
      }),
      new OptimizeCSSAssetsPlugin({})
    ]
  },
  entry: './js/app.js',
  output: {
    filename: 'app.js',
    path: path.resolve(__dirname, '../priv/static/js')
  },
  module: {
    rules: [{
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.(css|sass|scss)$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              importLoaders: 2,
              sourceMap: true
            }
          },
          {
            loader: 'postcss-loader',
            options: {
              plugins: () => [
                require('autoprefixer')
              ],
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true
            }
          }
        ]
      },
      {
        test: /\.(woff(2)?|ttf|eot|svg)(\?v=\d+\.\d+\.\d+)?$/,
        use: [{
          loader: 'file-loader',
          options: {
            name: '[name].[ext]',
            outputPath: '../fonts'
          }
        }]
      }
    ]
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: '../css/app.css'
    }),
    new CopyWebpackPlugin([{
      from: 'static/',
      to: '../'
    }])
  ]
});