webpack/lib/optimize/ChunkModuleIdRangePlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
"use strict";

const sortByIndex = (a, b) => {
	return a.index - b.index;
};

const sortByIndex2 = (a, b) => {
	return a.index2 - b.index2;
};

class ChunkModuleIdRangePlugin {
	constructor(options) {
		this.options = options;
	}

	apply(compiler) {
		const options = this.options;
		compiler.hooks.compilation.tap("ChunkModuleIdRangePlugin", compilation => {
			compilation.hooks.moduleIds.tap("ChunkModuleIdRangePlugin", modules => {
				const chunk = compilation.chunks.find(
					chunk => chunk.name === options.name
				);
				if (!chunk) {
					throw new Error(
						`ChunkModuleIdRangePlugin: Chunk with name '${options.name}"' was not found`
					);
				}

				let chunkModules;
				if (options.order) {
					chunkModules = Array.from(chunk.modulesIterable);
					switch (options.order) {
						case "index":
							chunkModules.sort(sortByIndex);
							break;
						case "index2":
							chunkModules.sort(sortByIndex2);
							break;
						default:
							throw new Error(
								"ChunkModuleIdRangePlugin: unexpected value of order"
							);
					}
				} else {
					chunkModules = modules.filter(m => {
						return m.chunksIterable.has(chunk);
					});
				}

				let currentId = options.start || 0;
				for (let i = 0; i < chunkModules.length; i++) {
					const m = chunkModules[i];
					if (m.id === null) {
						m.id = currentId++;
					}
					if (options.end && currentId > options.end) break;
				}
			});
		});
	}
}
module.exports = ChunkModuleIdRangePlugin;