Method codeGeneration

lib/container/FallbackModule.js:148–180

* Generates code and runtime requirements for this module. * @param {CodeGenerationContext} context context for code generation * @returns {CodeGenerationResult} result

({ runtimeTemplate, moduleGraph, chunkGraph })

	 * @returns {CodeGenerationResult} result
	 */
	codeGeneration({ runtimeTemplate, moduleGraph, chunkGraph }) {
		const ids = this.dependencies.map((dep) =>
			chunkGraph.getModuleId(/** @type {Module} */ (moduleGraph.getModule(dep)))
		);
		const cst = runtimeTemplate.renderConst();
		const lt = runtimeTemplate.renderLet();
		const code = Template.asString([
			`${cst} ids = ${JSON.stringify(ids)};`,
			`${lt} error, result, i = 0;`,
			`${cst} loop = ${runtimeTemplate.basicFunction("next", [
				"while(i < ids.length) {",
				Template.indent([
					`try { next = ${RuntimeGlobals.require}(ids[i++]); } catch(e) { return handleError(e); }`,
					"if(next) return next.then ? next.then(handleResult, handleError) : handleResult(next);"
				]),
				"}",
				"if(error) throw error;"
			])}`,
			`${cst} handleResult = ${runtimeTemplate.basicFunction("result", [
				"if(result) return result;",
				"return loop();"
			])};`,
			`${cst} handleError = ${runtimeTemplate.basicFunction("e", [
				"error = e;",
				"return loop();"
			])};`,
			"module.exports = loop();"
		]);
		/** @type {Sources} */
		const sources = new Map();
		sources.set(JAVASCRIPT_TYPE, new RawSource(code));
		return { sources, runtimeRequirements: RUNTIME_REQUIREMENTS };
	}

	/**
	 * Serializes this instance into the provided serializer context.