mirror of https://github.com/webpack/webpack.git
38 lines
934 B
JavaScript
38 lines
934 B
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const RuntimeGlobals = require("../RuntimeGlobals");
|
|
const Template = require("../Template");
|
|
const HelperRuntimeModule = require("./HelperRuntimeModule");
|
|
|
|
class DefinePropertyGetterRuntimeModule extends HelperRuntimeModule {
|
|
constructor() {
|
|
super("define property getter");
|
|
}
|
|
|
|
/**
|
|
* @returns {string} runtime code
|
|
*/
|
|
generate() {
|
|
const fn = RuntimeGlobals.definePropertyGetter;
|
|
return Template.asString([
|
|
"// define getter function for harmony exports",
|
|
"var hasOwnProperty = Object.prototype.hasOwnProperty;",
|
|
`${fn} = function(exports, name, getter) {`,
|
|
Template.indent([
|
|
`if(!hasOwnProperty.call(exports, name)) {`,
|
|
Template.indent([
|
|
"Object.defineProperty(exports, name, { enumerable: true, get: getter });"
|
|
]),
|
|
"}"
|
|
]),
|
|
"};"
|
|
]);
|
|
}
|
|
}
|
|
|
|
module.exports = DefinePropertyGetterRuntimeModule;
|