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node_modules/webpack/lib/dependencies/ImportDependency.js

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+/*
+	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");
+const ModuleDependency = require("./ModuleDependency");
+
+/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
+/** @typedef {import("../AsyncDependenciesBlock")} AsyncDependenciesBlock */
+/** @typedef {import("../Dependency").RawReferencedExports} RawReferencedExports */
+/** @typedef {import("../Dependency").ReferencedExports} ReferencedExports */
+/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
+/** @typedef {import("../Module")} Module */
+/** @typedef {import("../Module").BuildMeta} BuildMeta */
+/** @typedef {import("../ModuleGraph")} ModuleGraph */
+/** @typedef {import("../javascript/JavascriptParser").ImportAttributes} ImportAttributes */
+/** @typedef {import("../javascript/JavascriptParser").Range} Range */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
+/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
+/** @typedef {import("./ImportPhase").ImportPhaseType} ImportPhaseType */
+
+class ImportDependency extends ModuleDependency {
+	/**
+	 * @param {string} request the request
+	 * @param {Range} range expression range
+	 * @param {RawReferencedExports | null} referencedExports list of referenced exports
+	 * @param {ImportPhaseType} phase import phase
+	 * @param {ImportAttributes=} attributes import attributes
+	 */
+	constructor(request, range, referencedExports, phase, attributes) {
+		super(request);
+		this.range = range;
+		this.referencedExports = referencedExports;
+		this.phase = phase;
+		this.attributes = attributes;
+	}
+
+	get type() {
+		return "import()";
+	}
+
+	get category() {
+		return "esm";
+	}
+
+	/**
+	 * @returns {string | null} an identifier to merge equal requests
+	 */
+	getResourceIdentifier() {
+		let str = super.getResourceIdentifier();
+		if (this.attributes) {
+			str += `|importAttributes${JSON.stringify(this.attributes)}`;
+		}
+		return str;
+	}
+
+	/**
+	 * Returns list of exports referenced by this dependency
+	 * @param {ModuleGraph} moduleGraph module graph
+	 * @param {RuntimeSpec} runtime the runtime for which the module is analysed
+	 * @returns {ReferencedExports} referenced exports
+	 */
+	getReferencedExports(moduleGraph, runtime) {
+		if (!this.referencedExports) return Dependency.EXPORTS_OBJECT_REFERENCED;
+		/** @type {ReferencedExports} */
+		const refs = [];
+		for (const referencedExport of this.referencedExports) {
+			if (referencedExport[0] === "default") {
+				const selfModule =
+					/** @type {Module} */
+					(moduleGraph.getParentModule(this));
+				const importedModule =
+					/** @type {Module} */
+					(moduleGraph.getModule(this));
+				const exportsType = importedModule.getExportsType(
+					moduleGraph,
+					/** @type {BuildMeta} */
+					(selfModule.buildMeta).strictHarmonyModule
+				);
+				if (
+					exportsType === "default-only" ||
+					exportsType === "default-with-named"
+				) {
+					return Dependency.EXPORTS_OBJECT_REFERENCED;
+				}
+			}
+			refs.push({
+				name: referencedExport,
+				canMangle: false
+			});
+		}
+		return refs;
+	}
+
+	/**
+	 * @param {ObjectSerializerContext} context context
+	 */
+	serialize(context) {
+		context.write(this.range);
+		context.write(this.referencedExports);
+		context.write(this.phase);
+		context.write(this.attributes);
+		super.serialize(context);
+	}
+
+	/**
+	 * @param {ObjectDeserializerContext} context context
+	 */
+	deserialize(context) {
+		this.range = context.read();
+		this.referencedExports = context.read();
+		this.phase = context.read();
+		this.attributes = context.read();
+		super.deserialize(context);
+	}
+}
+
+makeSerializable(ImportDependency, "webpack/lib/dependencies/ImportDependency");
+
+ImportDependency.Template = class ImportDependencyTemplate extends (
+	ModuleDependency.Template
+) {
+	/**
+	 * @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,
+		{ runtimeTemplate, module, moduleGraph, chunkGraph, runtimeRequirements }
+	) {
+		const dep = /** @type {ImportDependency} */ (dependency);
+		const block = /** @type {AsyncDependenciesBlock} */ (
+			moduleGraph.getParentBlock(dep)
+		);
+		const content = runtimeTemplate.moduleNamespacePromise({
+			chunkGraph,
+			block,
+			module: /** @type {Module} */ (moduleGraph.getModule(dep)),
+			request: dep.request,
+			strict: /** @type {BuildMeta} */ (module.buildMeta).strictHarmonyModule,
+			dependency: dep,
+			message: "import()",
+			runtimeRequirements
+		});
+
+		source.replace(dep.range[0], dep.range[1] - 1, content);
+	}
+};
+
+module.exports = ImportDependency;