source: trip-planner-front/node_modules/merge-descriptors/index.js@ 571e0df

Last change on this file since 571e0df was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
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1/*!
2 * merge-descriptors
3 * Copyright(c) 2014 Jonathan Ong
4 * Copyright(c) 2015 Douglas Christopher Wilson
5 * MIT Licensed
6 */
7
8'use strict'
9
10/**
11 * Module exports.
12 * @public
13 */
14
15module.exports = merge
16
17/**
18 * Module variables.
19 * @private
20 */
21
22var hasOwnProperty = Object.prototype.hasOwnProperty
23
24/**
25 * Merge the property descriptors of `src` into `dest`
26 *
27 * @param {object} dest Object to add descriptors to
28 * @param {object} src Object to clone descriptors from
29 * @param {boolean} [redefine=true] Redefine `dest` properties with `src` properties
30 * @returns {object} Reference to dest
31 * @public
32 */
33
34function merge(dest, src, redefine) {
35 if (!dest) {
36 throw new TypeError('argument dest is required')
37 }
38
39 if (!src) {
40 throw new TypeError('argument src is required')
41 }
42
43 if (redefine === undefined) {
44 // Default to true
45 redefine = true
46 }
47
48 Object.getOwnPropertyNames(src).forEach(function forEachOwnPropertyName(name) {
49 if (!redefine && hasOwnProperty.call(dest, name)) {
50 // Skip desriptor
51 return
52 }
53
54 // Copy descriptor
55 var descriptor = Object.getOwnPropertyDescriptor(src, name)
56 Object.defineProperty(dest, name, descriptor)
57 })
58
59 return dest
60}
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