webpack/lib/runtime/PublicPathRuntimeModule.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
*/

"use strict";

const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");

/** @import { PublicPath } from "../../declarations/WebpackOptions" */
/** @import Compilation from "../Compilation" */

class PublicPathRuntimeModule extends RuntimeModule {
	/**
	 * Returns true, if the runtime module should get it's own scope.
	 * When false, `generate()` must emit complete statements ending with `;`
	 * so a following runtime IIFE is not parsed as a call (ASI).
	 * @returns {boolean} true, if the runtime module should get it's own scope
	 */
	shouldIsolate() {
		return false;
	}

	/**
	 * @param {PublicPath} publicPath public path
	 */
	constructor(publicPath) {
		super("publicPath", RuntimeModule.STAGE_BASIC);
		/** @type {PublicPath} */
		this.publicPath = publicPath;
	}

	/**
	 * The `[handlerMap, key]` pairs this module installs onto a chunk handler map
	 * such as `__webpack_require__.f`, or `null` where it cannot name them.
	 * @returns {[string, string][] | null} installed chunk handlers (do not mutate)
	 */
	getInstalledChunkHandlers() {
		return RuntimeModule.NO_CHUNK_HANDLERS;
	}

	/**
	 * Generates runtime code for this runtime module.
	 * @returns {string | null} runtime code
	 */
	generate() {
		const { publicPath } = this;
		const compilation = /** @type {Compilation} */ (this.compilation);

		return `${RuntimeGlobals.publicPath} = ${JSON.stringify(
			compilation.getPath(publicPath || "", {
				hash: compilation.hash || "XXXX"
			})
		)};`;
	}
}

module.exports = PublicPathRuntimeModule;