Object.keys()

The Object.keys() static method returns an array of a given object’s own enumerable string-keyed property names.

Object.keys() returns an array whose elements are strings corresponding to the enumerable string-keyed property names found directly upon object. This is the same as iterating with a for…in loop, except that a for…in loop enumerates properties in the prototype chain as well. The order of the array returned by Object.keys() is the same as that provided by a for…in loop.

If you need the property values, use Object.values() instead. If you need both the property keys and values, use Object.entries() instead.

Syntax example: Object.keys(obj)