webpack/lib/async-modules/AsyncModuleHelpers.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports 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 Haijie Xie @hai-x
*/

"use strict";

const HarmonyImportDependency = require("../dependencies/HarmonyImportDependency");

/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../Module")} Module */

/** @typedef {Set<Module>} Modules */

/**
 * @param {ModuleGraph} moduleGraph module graph
 * @param {Module} module module
 * @returns {Modules} set of modules
 */
const getOutgoingAsyncModules = (moduleGraph, module) => {
	/** @type {Modules} */
	const set = new Set();
	/** @type {Modules} */
	const seen = new Set();
	(function g(module) {
		if (!moduleGraph.isAsync(module) || seen.has(module)) return;
		seen.add(module);
		if (module.buildMeta && module.buildMeta.async) {
			set.add(module);
		} else {
			const outgoingConnectionMap =
				moduleGraph.getOutgoingConnectionsByModule(module);
			if (outgoingConnectionMap) {
				for (const [module, connections] of outgoingConnectionMap) {
					if (
						connections.some(
							(c) =>
								c.dependency instanceof HarmonyImportDependency &&
								c.isTargetActive(undefined)
						) &&
						module
					) {
						g(module);
					}
				}
			}
		}
	})(module);
	return set;
};

module.exports.getOutgoingAsyncModules = getOutgoingAsyncModules;