Method apply

lib/HotModuleReplacementPlugin.js:120–990

* Applies the plugin by registering its hooks on the compiler. * @param {Compiler} compiler the compiler instance * @returns {void}

(compiler)

	 * @returns {void}
	 */
	apply(compiler) {
		const { _backCompat: backCompat } = compiler;
		if (compiler.options.output.strictModuleErrorHandling === undefined) {
			compiler.options.output.strictModuleErrorHandling = true;
		}
		const runtimeRequirements = [RuntimeGlobals.module];

		/**
		 * Creates an accept handler.
		 * @param {JavascriptParser} parser the parser
		 * @param {typeof ModuleHotAcceptDependency} ParamDependency dependency
		 * @returns {(expr: CallExpression) => boolean | undefined} callback
		 */
		const createAcceptHandler = (parser, ParamDependency) => {
			const { hotAcceptCallback, hotAcceptWithoutCallback } =
				HotModuleReplacementPlugin.getParserHooks(parser);

			return (expr) => {
				const module = parser.state.module;
				const dep = new ConstDependency(
					`${module.moduleArgument}.hot.accept`,
					/** @type {Range} */ (expr.callee.range),
					runtimeRequirements
				);
				dep.loc = /** @type {DependencyLocation} */ (expr.loc);
				module.addPresentationalDependency(dep);
				/** @type {BuildInfo} */
				(module.buildInfo).moduleConcatenationBailout =
					class="st">"Hot Module Replacement";

				if (expr.arguments.length >= 1) {
					const arg = parser.evaluateExpression(expr.arguments[0]);
					/** @type {BasicEvaluatedExpression[]} */
					let params = [];
					if (arg.isString()) {
						params = [arg];
					} else if (arg.isArray()) {
						params =
							/** @type {BasicEvaluatedExpression[]} */
							(arg.items).filter((param) => param.isString());
					}
					/** @type {Requests} */
					const requests = [];
					if (params.length > 0) {
						for (const [idx, param] of params.entries()) {
							const request = /** @type {string} */ (param.string);
							const dep = new ParamDependency(
								request,
								/** @type {Range} */ (param.range)
							);
							dep.optional = true;
							dep.setLocWithIndex(
								/** @type {DependencyLocation} */ (expr.loc),
								idx
							);
							module.addDependency(dep);
							requests.push(request);
						}