Method generate

lib/runtime/AsyncModuleRuntimeModule.js:27–199

* Generates runtime code for this runtime module. * @returns {string | null} runtime code

()

	 * @returns {string | null} runtime code
	 */
	generate() {
		const compilation = /** @type {Compilation} */ (this.compilation);
		const { runtimeTemplate } = compilation;
		const fn = RuntimeGlobals.asyncModule;
		const defer = this._deferInterop;
		const cst = runtimeTemplate.renderConst();
		const lt = runtimeTemplate.renderLet();
		return Template.asString([
			`${cst} hasSymbol = typeof Symbol === "function";`,
			`${cst} webpackQueues = hasSymbol ? Symbol("webpack queues") : "__webpack_queues__";`,
			`${cst} webpackExports = ${
				defer ? `${RuntimeGlobals.asyncModuleExportSymbol}= ` : ""
			}hasSymbol ? Symbol("webpack exports") : "${RuntimeGlobals.exports}";`,
			`${cst} webpackError = hasSymbol ? Symbol("webpack error") : "__webpack_error__";`,
			defer
				? Template.asString([
						`${cst} webpackDone = ${RuntimeGlobals.asyncModuleDoneSymbol} = hasSymbol ? Symbol("webpack done") : "__webpack_done__";`,
						`${cst} webpackDefer = ${RuntimeGlobals.deferredModuleAsyncTransitiveDependenciesSymbol} = hasSymbol ? Symbol("webpack defer") : "__webpack_defer__";`,
						`${RuntimeGlobals.deferredModuleAsyncTransitiveDependencies} = ${runtimeTemplate.basicFunction(
							"asyncDeps",
							[
								Template.indent([
									`${cst} hasUnresolvedAsyncSubgraph = asyncDeps.some((id) => {`,
									Template.indent([
										`${cst} cache = __webpack_module_cache__[id];`,
										"return !cache || cache[webpackDone] === false;"
									]),
									"});",
									"if (hasUnresolvedAsyncSubgraph) {",
									Template.indent([
										"return ({ then(onFulfilled, onRejected) { return Promise.all(asyncDeps.map(__webpack_require__)).then(onFulfilled, onRejected) } })"
									]),
									"}"
								])
							]
						)}`
					])
				: "",
			`${cst} resolveQueue = ${runtimeTemplate.basicFunction("queue", [
				`if(${runtimeTemplate.optionalChaining("queue", "d < 1")}) {`,
				Template.indent([
					"queue.d = 1;",
					`queue.forEach(${runtimeTemplate.expressionFunction(
						"fn.r--",
						"fn"
					)});`,
					`queue.forEach(${runtimeTemplate.expressionFunction(
						"fn.r-- ? fn.r++ : fn()",
						"fn"
					)});`
				]),
				"}"
			])}`,
			`${cst} wrapDeps = ${runtimeTemplate.returningFunction(
				`deps.map(${runtimeTemplate.basicFunction("dep", [
					'if(dep !== null && typeof dep === "object") {',
					Template.indent([
						defer