source: trip-planner-front/node_modules/lodash/isPlainObject.js@ e29cc2e

Last change on this file since e29cc2e was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1var baseGetTag = require('./_baseGetTag'),
2 getPrototype = require('./_getPrototype'),
3 isObjectLike = require('./isObjectLike');
4
5/** `Object#toString` result references. */
6var objectTag = '[object Object]';
7
8/** Used for built-in method references. */
9var funcProto = Function.prototype,
10 objectProto = Object.prototype;
11
12/** Used to resolve the decompiled source of functions. */
13var funcToString = funcProto.toString;
14
15/** Used to check objects for own properties. */
16var hasOwnProperty = objectProto.hasOwnProperty;
17
18/** Used to infer the `Object` constructor. */
19var objectCtorString = funcToString.call(Object);
20
21/**
22 * Checks if `value` is a plain object, that is, an object created by the
23 * `Object` constructor or one with a `[[Prototype]]` of `null`.
24 *
25 * @static
26 * @memberOf _
27 * @since 0.8.0
28 * @category Lang
29 * @param {*} value The value to check.
30 * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
31 * @example
32 *
33 * function Foo() {
34 * this.a = 1;
35 * }
36 *
37 * _.isPlainObject(new Foo);
38 * // => false
39 *
40 * _.isPlainObject([1, 2, 3]);
41 * // => false
42 *
43 * _.isPlainObject({ 'x': 0, 'y': 0 });
44 * // => true
45 *
46 * _.isPlainObject(Object.create(null));
47 * // => true
48 */
49function isPlainObject(value) {
50 if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
51 return false;
52 }
53 var proto = getPrototype(value);
54 if (proto === null) {
55 return true;
56 }
57 var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
58 return typeof Ctor == 'function' && Ctor instanceof Ctor &&
59 funcToString.call(Ctor) == objectCtorString;
60}
61
62module.exports = isPlainObject;
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