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webpack-config.js
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webpack-config.js
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const path = require('path');
const merge = require('webpack-merge');
const ClosureCompiler = require('google-closure-compiler-js').webpack;
module.exports = function getWebpackConfig(opts) {
const rules = () => {
const list = [];
const {
isReact,
isPreact
} = opts;
if (!isReact && !isPreact) {
return list;
}
list.push({
test: /\.(js|jsx)$/,
exclude: /(node_modules|bower_components)/,
loader: require.resolve('babel-loader'),
options: {
presets: isReact || isPreact ? [require.resolve('babel-preset-react-es2015')] : [],
plugins: isPreact ? [[require.resolve('babel-plugin-transform-react-jsx'), { pragma: 'h' }]] : [],
}
});
return list;
};
const config = {
watch: opts.watch,
devtool: false,
entry: {
[opts.libraryName]: opts.entry
},
output: {
path: process.cwd(),
filename: opts.output || '[name].bundle.js',
library: opts.libraryName,
libraryTarget: 'umd',
umdNamedDefine: true
},
plugins: [
new ClosureCompiler({
options: {
languageIn: 'ECMASCRIPT_2017',
languageOut: 'ECMASCRIPT5',
compilationLevel: 'SIMPLE',
rewritePolyfills: opts.polyfill,
createSourceMap: opts.createSourceMap
}
})
],
module: {
rules: rules()
}
};
return merge(config, opts.customConfig || {});
}