source: frontend/node_modules/webpack/lib/runtime/DefinePropertyGettersRuntimeModule.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
*/

"use strict";

const RuntimeGlobals = require("../RuntimeGlobals");
const Template = require("../Template");
const HelperRuntimeModule = require("./HelperRuntimeModule");

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

class DefinePropertyGettersRuntimeModule extends HelperRuntimeModule {
        constructor() {
                super("define property getters");
        }

        /**
         * Generates runtime code for this runtime module.
         * @returns {string | null} runtime code
         */
        generate() {
                const compilation = /** @type {Compilation} */ (this.compilation);
                const { runtimeTemplate } = compilation;
                const fn = RuntimeGlobals.definePropertyGetters;
                return Template.asString([
                        "// define getter functions for harmony exports",
                        `${fn} = ${runtimeTemplate.basicFunction("exports, definition", [
                                "for(var key in definition) {",
                                Template.indent([
                                        `if(${RuntimeGlobals.hasOwnProperty}(definition, key) && !${RuntimeGlobals.hasOwnProperty}(exports, key)) {`,
                                        Template.indent([
                                                "Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });"
                                        ]),
                                        "}"
                                ]),
                                "}"
                        ])};`
                ]);
        }
}

module.exports = DefinePropertyGettersRuntimeModule;