webpack/lib/dependencies/ExternalModuleInitFragmentDependency.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 Alexander Akait @alexander-akait
*/

"use strict";

const DependencyTemplate = require("../DependencyTemplate");
const makeSerializable = require("../util/makeSerializable");
const ExternalModuleInitFragment = require("./ExternalModuleInitFragment");
const NullDependency = require("./NullDependency");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../javascript/JavascriptParser").Range} Range */
/** @typedef {import("../dependencies/ExternalModuleInitFragment").ArrayImportSpecifiers} ArrayImportSpecifiers */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */

class ExternalModuleInitFragmentDependency extends NullDependency {
	/**
	 * @param {string} module module
	 * @param {ArrayImportSpecifiers} importSpecifiers import specifiers
	 * @param {string | undefined} defaultImport default import
	 */
	constructor(module, importSpecifiers, defaultImport) {
		super();
		this.importedModule = module;
		this.specifiers = importSpecifiers;
		this.default = defaultImport;
	}

	/**
	 * @returns {string} hash update
	 */
	_createHashUpdate() {
		return `${this.importedModule}${JSON.stringify(this.specifiers)}${
			this.default || "null"
		}`;
	}

	/**
	 * @param {ObjectSerializerContext} context context
	 */
	serialize(context) {
		const { write } = context;
		write(this.importedModule);
		write(this.specifiers);
		write(this.default);
	}

	/**
	 * @param {ObjectDeserializerContext} context context
	 */
	deserialize(context) {
		const { read } = context;
		this.importedModule = read();
		this.specifiers = read();
		this.default = read();
	}
}

makeSerializable(
	ExternalModuleInitFragmentDependency,
	"webpack/lib/dependencies/ExternalModuleConstDependency"
);

ExternalModuleInitFragmentDependency.Template = class ExternalModuleConstDependencyTemplate extends (
	DependencyTemplate
) {
	/**
	 * @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 context object
	 * @returns {void}
	 */
	apply(dependency, source, templateContext) {
		const dep =
			/** @type {ExternalModuleInitFragmentDependency} */
			(dependency);
		const { chunkInitFragments, runtimeTemplate } = templateContext;

		chunkInitFragments.push(
			new ExternalModuleInitFragment(
				`${runtimeTemplate.supportNodePrefixForCoreModules() ? "node:" : ""}${
					dep.importedModule
				}`,
				dep.specifiers,
				dep.default
			)
		);
	}
};

module.exports = ExternalModuleInitFragmentDependency;