webpack/lib/json/JsonModulesPlugin.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 { JSON_MODULE_TYPE } = require("../ModuleTypeConstants");
const createSchemaValidation = require("../util/create-schema-validation");
const JsonGenerator = require("./JsonGenerator");
const JsonParser = require("./JsonParser");

/** @typedef {import("../Compiler")} Compiler */
/** @typedef {import("../util/fs").JsonArray} JsonArray */
/** @typedef {import("../util/fs").JsonObject} JsonObject */
/** @typedef {import("../util/fs").JsonValue} JsonValue */

const validate = createSchemaValidation(
	require("../../schemas/plugins/JsonModulesPluginParser.check.js"),
	() => require("../../schemas/plugins/JsonModulesPluginParser.json"),
	{
		name: "Json Modules Plugin",
		baseDataPath: "parser"
	}
);

const validateGenerator = createSchemaValidation(
	require("../../schemas/plugins/JsonModulesPluginGenerator.check.js"),
	() => require("../../schemas/plugins/JsonModulesPluginGenerator.json"),
	{
		name: "Json Modules Plugin",
		baseDataPath: "generator"
	}
);

const PLUGIN_NAME = "JsonModulesPlugin";

/**
 * The JsonModulesPlugin is the entrypoint plugin for the json modules feature.
 * It adds the json module type to the compiler and registers the json parser and generator.
 */
class JsonModulesPlugin {
	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		compiler.hooks.compilation.tap(
			PLUGIN_NAME,
			(compilation, { normalModuleFactory }) => {
				normalModuleFactory.hooks.createParser
					.for(JSON_MODULE_TYPE)
					.tap(PLUGIN_NAME, parserOptions => {
						validate(parserOptions);
						return new JsonParser(parserOptions);
					});
				normalModuleFactory.hooks.createGenerator
					.for(JSON_MODULE_TYPE)
					.tap(PLUGIN_NAME, generatorOptions => {
						validateGenerator(generatorOptions);
						return new JsonGenerator(generatorOptions);
					});
			}
		);
	}
}

module.exports = JsonModulesPlugin;