webpack.config.js

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack');

module.exports = {
  entry: './app/javascripts/app.js',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'app.js'
  },
  plugins: [
    // Copy our app's index.html to the build folder.
    new CopyWebpackPlugin([
      {from: './app/index.html', to: "index.html"},
      {from: './app/trading.html', to: "trading.html"},
      {from: './app/account.html', to: "account.html"}
    ]),
   new webpack.ProvidePlugin({
      $: 'jquery',
      jquery: 'jQuery',
      'window.jQuery': 'jquery',
      Tether: 'tether'
    })
  ],
  module: {
    rules: [
      {test: /\.css$/,use: [ 'style-loader', 'css-loader' ]},
      {test: /\.scss$/, use: ['style-loader', 'css-loader', 'postcss-loader', 'sass-loader']},
      {
        test: /\.woff2?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: 'url-loader?limit=10000',
    },
    {
        test: /\.(ttf|eot|svg)(\?[\s\S]+)?$/,
        use: 'file-loader',
    },
    ],
    loaders: [
      { test: /\.json$/, use: 'json-loader' },
      {
        test: /\.js$/,
        exclude: /(node_modules|bower_components)/,
        loader: 'babel-loader',
        query: {
          presets: ['es2015'],
          plugins: ['transform-runtime']
        }
      }
    ]
  }
}