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webpack.config.js
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webpack.config.js
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const path = require('path');
const webpack = require('webpack');
// const TerserPlugin = require('terser-webpack-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
// build directory: docs/${VERSION}
const VERSION = '16';
module.exports = {
mode: 'production',
entry: {
main: path.join(__dirname, 'js', 'main.jsx'),
},
output: {
path: path.join(__dirname, 'docs', VERSION),
filename: '[name].js'
},
resolve: {
extensions: ['.js', '.jsx']
},
module: {
rules: [{
test: /\.jsx?$/,
exclude: /node_modules/,
use: [
{
loader: 'babel-loader',
options: {
presets: [["es2015", { modules: false }], "react"]
}
}
]
}]
},
optimization: {
minimizer: [
// new TerserPlugin({
// terserOptions: {
new UglifyJsPlugin({
uglifyOptions: {
parse: {
// we want uglify-js to parse ecma 8 code. However, we don't want it
// to apply any minfication steps that turns valid ecma 5 code
// into invalid ecma 5 code. This is why the 'compress' and 'output'
// sections only apply transformations that are ecma 5 safe
// https://github.com/facebook/create-react-app/pull/4234
ecma: 8,
},
compress: {
ecma: 5,
warnings: false,
// Disabled because of an issue with Uglify breaking seemingly valid code:
// https://github.com/facebook/create-react-app/issues/2376
// Pending further investigation:
// https://github.com/mishoo/UglifyJS2/issues/2011
comparisons: false,
},
mangle: {
safari10: true,
},
output: {
ecma: 5,
comments: false,
// Turned on because emoji and regex is not minified properly using default
// https://github.com/facebook/create-react-app/issues/2488
ascii_only: true,
},
},
// Use multi-process parallel running to improve the build speed
// Default number of concurrent runs: os.cpus().length - 1
parallel: true,
// Enable file caching
cache: true,
}),
]
},
plugins: [
new webpack.DefinePlugin({
'process.env': { NODE_ENV: JSON.stringify('production') }
}),
],
};