js-files.js

/**
 * @package Polylang
 */

/**
 * External dependencies
 */
const path = require( 'path' );

/**
 * Peer dependencies
 * These need to be installed in the consuming package.
 */
const TerserPlugin = require( 'terser-webpack-plugin' );

/**
 * Prepare webpack configuration to minify js files to source folder as target folder and suffix file name with .min.js extension.
 * @param {string[]} jsFileNames Source files to build.
 * @param {boolean} minimize True to generate minified files.
 */
 function transformJsEntry( destination, minimize = false ) {
	return ( filename ) => {
		const entry = {};
		entry[ path.parse( filename ).name ] = filename;
		const output = {
			filename: `${path.parse( filename ).name}${minimize ? '.min' : '' }.js`,
			path: destination,
			iife: false, // Avoid Webpack to wrap files into a IIFE which is not needed for this kind of javascript files.
		};
		const config = {
			entry: entry,
			output: output,
			optimization: {
				minimize: minimize,
				minimizer: [ new TerserPlugin( { extractComments: false } ) ]
			}
		};
		return config;
	}
}

module.exports = { transformJsEntry };