blob: 9a2823198e746ff49a7bc8257565c711e416486d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
'use strict';
var getPrototypeOf = Object.getPrototypeOf, prototype = Object.prototype
, toString = prototype.toString
, id = Object().toString();
module.exports = function (value) {
var proto, constructor;
if (!value || (typeof value !== 'object') || (toString.call(value) !== id)) {
return false;
}
proto = getPrototypeOf(value);
if (proto === null) {
constructor = value.constructor;
if (typeof constructor !== 'function') return true;
return (constructor.prototype !== value);
}
return (proto === prototype) || (getPrototypeOf(proto) === null);
};
|
