webpack.config.js

// webpack.config.js
module.exports = {
  mode: 'development',
  entry: './src/index.js',
  output: {
    filename: 'iiif-photowall.js',
    publicPath: 'dist',
    libraryTarget: 'umd',
    library: 'iiifPhotoWall'
  },
   module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      },
      {
        test: require.resolve('jquery'),
        use: [
            {
              loader: 'expose-loader',
              options: 'jQuery'
            },{
              loader: 'expose-loader',
              options: '$'
            }
        ]
     },
     {
          test: /\.s?css$/,
          use: [
            'style-loader', // creates style nodes from JS strings
            'css-loader', // translates CSS into CommonJS
            'sass-loader', // compiles Sass to CSS, using Node Sass by default
          ]
     },
     {
        rules: [{
            test: /\.less$/,
            use: [{
                loader: 'style-loader' // creates style nodes from JS strings
            }, {
                loader: 'css-loader' // translates CSS into CommonJS
            }, {
                loader: 'less-loader' // compiles Less to CSS
            }]
        }]
     },
     {
         test: /\.(jpe?g|png|gif|woff|woff2|eot|ttf|svg)(\?[a-z0-9=.]+)?$/,
         loader: 'url-loader?limit=100000' 
     }
   ]
  }
};