Creates an array of the own and inherited enumerable property names of object.
object
5.5.0
function Foo() { this.a = 1; this.b = 2;}Foo.prototype.c = 3;keysIn(new Foo);// => ['a', 'b', 'c'] (iteration order is not guaranteed) Copy
function Foo() { this.a = 1; this.b = 2;}Foo.prototype.c = 3;keysIn(new Foo);// => ['a', 'b', 'c'] (iteration order is not guaranteed)
The object to query.
Returns the array of property names.
Creates an array of the own and inherited enumerable property names of
object.Since
5.5.0
Example