webpack/lib/dependencies/ImportPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support 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 ImportContextDependency = require("./ImportContextDependency");
const ImportDependency = require("./ImportDependency");
const ImportEagerDependency = require("./ImportEagerDependency");
const ImportParserPlugin = require("./ImportParserPlugin");
const ImportWeakDependency = require("./ImportWeakDependency");

/** @typedef {import("../Compiler")} Compiler */

class ImportPlugin {
	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		compiler.hooks.compilation.tap(
			"ImportPlugin",
			(compilation, { contextModuleFactory, normalModuleFactory }) => {
				compilation.dependencyFactories.set(
					ImportDependency,
					normalModuleFactory
				);
				compilation.dependencyTemplates.set(
					ImportDependency,
					new ImportDependency.Template()
				);

				compilation.dependencyFactories.set(
					ImportEagerDependency,
					normalModuleFactory
				);
				compilation.dependencyTemplates.set(
					ImportEagerDependency,
					new ImportEagerDependency.Template()
				);

				compilation.dependencyFactories.set(
					ImportWeakDependency,
					normalModuleFactory
				);
				compilation.dependencyTemplates.set(
					ImportWeakDependency,
					new ImportWeakDependency.Template()
				);

				compilation.dependencyFactories.set(
					ImportContextDependency,
					contextModuleFactory
				);
				compilation.dependencyTemplates.set(
					ImportContextDependency,
					new ImportContextDependency.Template()
				);

				const handler = (parser, parserOptions) => {
					if (parserOptions.import !== undefined && !parserOptions.import)
						return;

					new ImportParserPlugin(parserOptions).apply(parser);
				};

				normalModuleFactory.hooks.parser
					.for("javascript/auto")
					.tap("ImportPlugin", handler);
				normalModuleFactory.hooks.parser
					.for("javascript/dynamic")
					.tap("ImportPlugin", handler);
				normalModuleFactory.hooks.parser
					.for("javascript/esm")
					.tap("ImportPlugin", handler);
			}
		);
	}
}
module.exports = ImportPlugin;