webpack/lib/APIPlugin.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 ConstDependency = require("./dependencies/ConstDependency");
const ParserHelpers = require("./ParserHelpers");

const NullFactory = require("./NullFactory");

/* eslint-disable camelcase */
const REPLACEMENTS = {
	__webpack_require__: "__webpack_require__",
	__webpack_public_path__: "__webpack_require__.p",
	__webpack_modules__: "__webpack_require__.m",
	__webpack_chunk_load__: "__webpack_require__.e",
	__non_webpack_require__: "require",
	__webpack_nonce__: "__webpack_require__.nc",
	"require.onError": "__webpack_require__.oe"
};
const NO_WEBPACK_REQUIRE = {
	__non_webpack_require__: true
};
const REPLACEMENT_TYPES = {
	__webpack_public_path__: "string",
	__webpack_require__: "function",
	__webpack_modules__: "object",
	__webpack_chunk_load__: "function",
	__webpack_nonce__: "string"
};
/* eslint-enable camelcase */

class APIPlugin {
	apply(compiler) {
		compiler.hooks.compilation.tap(
			"APIPlugin",
			(compilation, { normalModuleFactory }) => {
				compilation.dependencyFactories.set(ConstDependency, new NullFactory());
				compilation.dependencyTemplates.set(
					ConstDependency,
					new ConstDependency.Template()
				);

				const handler = parser => {
					Object.keys(REPLACEMENTS).forEach(key => {
						parser.hooks.expression
							.for(key)
							.tap(
								"APIPlugin",
								NO_WEBPACK_REQUIRE[key]
									? ParserHelpers.toConstantDependency(
											parser,
											REPLACEMENTS[key]
									  )
									: ParserHelpers.toConstantDependencyWithWebpackRequire(
											parser,
											REPLACEMENTS[key]
									  )
							);
						const type = REPLACEMENT_TYPES[key];
						if (type) {
							parser.hooks.evaluateTypeof
								.for(key)
								.tap("APIPlugin", ParserHelpers.evaluateToString(type));
						}
					});
				};

				normalModuleFactory.hooks.parser
					.for("javascript/auto")
					.tap("APIPlugin", handler);
				normalModuleFactory.hooks.parser
					.for("javascript/dynamic")
					.tap("APIPlugin", handler);
				normalModuleFactory.hooks.parser
					.for("javascript/esm")
					.tap("APIPlugin", handler);
			}
		);
	}
}

module.exports = APIPlugin;