--- /dev/null
+'use strict'
+
+module.exports = clone
+
+var getPrototypeOf = Object.getPrototypeOf || function (obj) {
+ return obj.__proto__
+}
+
+function clone (obj) {
+ if (obj === null || typeof obj !== 'object')
+ return obj
+
+ if (obj instanceof Object)
+ var copy = { __proto__: getPrototypeOf(obj) }
+ else
+ var copy = Object.create(null)
+
+ Object.getOwnPropertyNames(obj).forEach(function (key) {
+ Object.defineProperty(copy, key, Object.getOwnPropertyDescriptor(obj, key))
+ })
+
+ return copy
+}