Method apply

lib/dependencies/WorkerDependency.js:112–152

* Applies the plugin by registering its hooks on the compiler. * @param {Dependency} dependency the dependency for which the template should be applied * @param {ReplaceSource} source the current replace source which can be modified * @param {DependencyTemplateContext} templateContext the cont

(dependency, source, templateContext)

	 * @returns {void}
	 */
	apply(dependency, source, templateContext) {
		const { chunkGraph, moduleGraph, runtimeRequirements, runtimeTemplate } =
			templateContext;
		const dep = /** @type {WorkerDependency} */ (dependency);
		const block = /** @type {AsyncDependenciesBlock} */ (
			moduleGraph.getParentBlock(dependency)
		);
		const entrypoint = /** @type {Entrypoint} */ (
			chunkGraph.getBlockChunkGroup(block)
		);
		const chunk = entrypoint.getEntrypointChunk();
		// We use the workerPublicPath option if provided, else we fallback to the RuntimeGlobal publicPath
		const workerImportBaseUrl = dep.options.publicPath
			? `"${dep.options.publicPath}"`
			: RuntimeGlobals.publicPath;

		runtimeRequirements.add(RuntimeGlobals.publicPath);
		runtimeRequirements.add(RuntimeGlobals.baseURI);
		runtimeRequirements.add(RuntimeGlobals.getChunkScriptFilename);

		const workerImportStr = `/* worker import */ ${workerImportBaseUrl} + ${
			RuntimeGlobals.getChunkScriptFilename
		}(${JSON.stringify(chunk.id)}), ${RuntimeGlobals.baseURI}`;

		source.replace(
			dep.range[0],
			dep.range[1] - 1,
			dep.options.needNewUrl ? `new URL(${workerImportStr})` : workerImportStr
		);

		// `Worker` is global only on the web, so route node (universal or node-only) through `worker_threads`
		const { platform } = runtimeTemplate.compilation.compiler;
		const ctorRange = dep.options.workerConstructorRange;
		if (
			ctorRange &&
			(runtimeTemplate.isUniversalTarget() || (platform.node && !platform.web))
		) {
			runtimeRequirements.add(RuntimeGlobals.worker);
			source.replace(ctorRange[0], ctorRange[1] - 1, RuntimeGlobals.worker);
		}
	}
};

makeSerializable(WorkerDependency, "webpack/lib/dependencies/WorkerDependency");