JavaScript Array keys() Method

The keys() method creates and returns a new iterator object which holds the key for every index in the array. This method does not affect the original array.

The JavaScript Array keys() method returns a new Array Iterator object that contains the keys for each index in the array.

The keys() method returns an Array Iterator object with the keys of an array.




var fruits = ["Banana", "Orange", "Apple", "Mango"];
var fk = fruits.keys();

for (x of fk) {
  document.getElementById("demo").innerHTML += x + "<br>";

Example -