webpack/lib/devtool/SourceMapDevToolModuleOptionsPlugin.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 JavascriptModulesPlugin = require("../javascript/JavascriptModulesPlugin");

/**
 * @import {
 * 	SourceMapDevToolPluginOptions
 * } from "./SourceMapDevToolPlugin"
 */
/** @import Compilation from "../Compilation" */

const PLUGIN_NAME = "SourceMapDevToolModuleOptionsPlugin";

class SourceMapDevToolModuleOptionsPlugin {
	/**
	 * Creates an instance of SourceMapDevToolModuleOptionsPlugin.
	 * @param {SourceMapDevToolPluginOptions=} options options
	 */
	constructor(options = {}) {
		/** @type {SourceMapDevToolPluginOptions} */
		this.options = options;
	}

	/**
	 * Applies the plugin by registering its hooks on the compiler.
	 * @param {Compilation} compilation the compiler instance
	 * @returns {void}
	 */
	apply(compilation) {
		const options = this.options;
		if (options.scopes) {
			const { dependencyTemplates } = compilation;
			dependencyTemplates.importBindingScopes = true;
			// Code generation cached by a build without scopes carries no binding
			// expressions, and nothing else in its key says the devtool changed.
			dependencyTemplates.updateHash("source-map-scopes");
		}
		if (options.module !== false) {
			compilation.hooks.buildModule.tap(PLUGIN_NAME, (module) => {
				module.useSourceMap = true;
			});
			compilation.hooks.runtimeModule.tap(PLUGIN_NAME, (module) => {
				module.useSourceMap = true;
			});
		} else {
			compilation.hooks.buildModule.tap(PLUGIN_NAME, (module) => {
				module.useSimpleSourceMap = true;
			});
			compilation.hooks.runtimeModule.tap(PLUGIN_NAME, (module) => {
				module.useSimpleSourceMap = true;
			});
		}
		JavascriptModulesPlugin.getCompilationHooks(compilation).useSourceMap.tap(
			PLUGIN_NAME,
			() => true
		);
	}
}

module.exports = SourceMapDevToolModuleOptionsPlugin;