webpack/lib/container/FallbackDependency.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

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

"use strict";

const Dependency = require("../Dependency");
const makeSerializable = require("../util/makeSerializable");

/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */

class FallbackDependency extends Dependency {
	/**
	 * @param {string[]} requests requests
	 */
	constructor(requests) {
		super();
		this.requests = requests;
	}

	/**
	 * @returns {string | null} an identifier to merge equal requests
	 */
	getResourceIdentifier() {
		return `fallback ${this.requests.join(" ")}`;
	}

	get type() {
		return "fallback";
	}

	get category() {
		return "esm";
	}

	/**
	 * @param {ObjectSerializerContext} context context
	 */
	serialize(context) {
		const { write } = context;
		write(this.requests);
		super.serialize(context);
	}

	/**
	 * @param {ObjectDeserializerContext} context context
	 * @returns {FallbackDependency} deserialize fallback dependency
	 */
	static deserialize(context) {
		const { read } = context;
		const obj = new FallbackDependency(read());
		obj.deserialize(context);
		return obj;
	}
}

makeSerializable(
	FallbackDependency,
	"webpack/lib/container/FallbackDependency"
);

module.exports = FallbackDependency;