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	webpack polyfills did not work because useBuiltIns: 'entry' expects a explicit core-js import. Changed it to 'usage' which does not require these explicit imports and polyfills based on browserslist. As a result, the built index.js now went from 128kB to 192kB. Ref: https://babeljs.io/docs/en/babel-preset-env#usebuiltins
		
			
				
	
	
		
			62 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			62 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
const path = require('path');
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const TerserPlugin = require('terser-webpack-plugin');
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module.exports = {
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  mode: 'production',
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  entry: {
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    index: ['./web_src/js/index']
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  },
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  devtool: 'source-map',
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  output: {
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    path: path.resolve(__dirname, 'public/js'),
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    filename: 'index.js',
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    chunkFilename: '[name].js',
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  },
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  optimization: {
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    minimize: true,
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    minimizer: [new TerserPlugin({
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      sourceMap: true,
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      extractComments: false,
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      terserOptions: {
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        output: {
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          comments: false,
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        },
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      },
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    })],
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  },
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  module: {
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    rules: [
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      {
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        test: /\.js$/,
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        exclude: /node_modules/,
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        use: {
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          loader: 'babel-loader',
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          options: {
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            presets: [
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              [
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                '@babel/preset-env',
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                {
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                  useBuiltIns: 'usage',
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                  corejs: 3,
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                }
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              ]
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            ],
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            plugins: [
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              [
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                '@babel/plugin-transform-runtime',
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                {
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                  regenerator: true,
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                }
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              ]
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            ],
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          }
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        }
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      },
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      {
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        test: /\.css$/i,
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        use: ['style-loader', 'css-loader'],
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      },
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    ]
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  }
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};
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