source: imaps-frontend/node_modules/webpack/lib/node/CommonJsChunkLoadingPlugin.js

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

"use strict";

const RuntimeGlobals = require("../RuntimeGlobals");
const StartupChunkDependenciesPlugin = require("../runtime/StartupChunkDependenciesPlugin");

/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../Compiler")} Compiler */

/**
 * @typedef {object} CommonJsChunkLoadingPluginOptions
 * @property {boolean} [asyncChunkLoading] enable async chunk loading
 */

class CommonJsChunkLoadingPlugin {
        /**
         * @param {CommonJsChunkLoadingPluginOptions} [options] options
         */
        constructor(options = {}) {
                this._asyncChunkLoading = options.asyncChunkLoading;
        }

        /**
         * Apply the plugin
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                const ChunkLoadingRuntimeModule = this._asyncChunkLoading
                        ? require("./ReadFileChunkLoadingRuntimeModule")
                        : require("./RequireChunkLoadingRuntimeModule");
                const chunkLoadingValue = this._asyncChunkLoading
                        ? "async-node"
                        : "require";
                new StartupChunkDependenciesPlugin({
                        chunkLoading: chunkLoadingValue,
                        asyncChunkLoading: this._asyncChunkLoading
                }).apply(compiler);
                compiler.hooks.thisCompilation.tap(
                        "CommonJsChunkLoadingPlugin",
                        compilation => {
                                const globalChunkLoading = compilation.outputOptions.chunkLoading;
                                /**
                                 * @param {Chunk} chunk chunk
                                 * @returns {boolean} true, if wasm loading is enabled for the chunk
                                 */
                                const isEnabledForChunk = chunk => {
                                        const options = chunk.getEntryOptions();
                                        const chunkLoading =
                                                options && options.chunkLoading !== undefined
                                                        ? options.chunkLoading
                                                        : globalChunkLoading;
                                        return chunkLoading === chunkLoadingValue;
                                };
                                const onceForChunkSet = new WeakSet();
                                /**
                                 * @param {Chunk} chunk chunk
                                 * @param {Set<string>} set runtime requirements
                                 */
                                const handler = (chunk, set) => {
                                        if (onceForChunkSet.has(chunk)) return;
                                        onceForChunkSet.add(chunk);
                                        if (!isEnabledForChunk(chunk)) return;
                                        set.add(RuntimeGlobals.moduleFactoriesAddOnly);
                                        set.add(RuntimeGlobals.hasOwnProperty);
                                        compilation.addRuntimeModule(
                                                chunk,
                                                new ChunkLoadingRuntimeModule(set)
                                        );
                                };

                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.ensureChunkHandlers)
                                        .tap("CommonJsChunkLoadingPlugin", handler);
                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.hmrDownloadUpdateHandlers)
                                        .tap("CommonJsChunkLoadingPlugin", handler);
                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.hmrDownloadManifest)
                                        .tap("CommonJsChunkLoadingPlugin", handler);
                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.baseURI)
                                        .tap("CommonJsChunkLoadingPlugin", handler);
                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.externalInstallChunk)
                                        .tap("CommonJsChunkLoadingPlugin", handler);
                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.onChunksLoaded)
                                        .tap("CommonJsChunkLoadingPlugin", handler);

                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.ensureChunkHandlers)
                                        .tap("CommonJsChunkLoadingPlugin", (chunk, set) => {
                                                if (!isEnabledForChunk(chunk)) return;
                                                set.add(RuntimeGlobals.getChunkScriptFilename);
                                        });
                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.hmrDownloadUpdateHandlers)
                                        .tap("CommonJsChunkLoadingPlugin", (chunk, set) => {
                                                if (!isEnabledForChunk(chunk)) return;
                                                set.add(RuntimeGlobals.getChunkUpdateScriptFilename);
                                                set.add(RuntimeGlobals.moduleCache);
                                                set.add(RuntimeGlobals.hmrModuleData);
                                                set.add(RuntimeGlobals.moduleFactoriesAddOnly);
                                        });
                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.hmrDownloadManifest)
                                        .tap("CommonJsChunkLoadingPlugin", (chunk, set) => {
                                                if (!isEnabledForChunk(chunk)) return;
                                                set.add(RuntimeGlobals.getUpdateManifestFilename);
                                        });
                        }
                );
        }
}

module.exports = CommonJsChunkLoadingPlugin;