JavaScript TypedArray keys() Method

The JavaScript keys() method is an inbuilt function in JavaScript. This method returns an Array Iterator object with the keys of an array.

What is Iterator?

An iterator is an object that keeps track of its current position, while accessing items in a collection one at a time.

An iterator returns an object with two properties: key and value.

Syntax:

Parameters:

No parameters.

Return value:

It returns a new array iterator object containing the keys for each index of the elements of the given array.

Browser Support:

Chrome	38.0
Edge	8
Firefox	28.0
Opera	25.0

Example

JavaScript TypedArray keys() Method

<script type="text/javascript">
// JavaScript to illustrate keys() method
// Creating some typedArrays
  var A = new Uint8Array([1, 2, 3, 4, 5]);
  var B = new Uint8Array([5, 10, 15, 20]);
 

   a = A.keys()
   document.write(a.next().value +"<br>");
    
   b = B.keys()
   b.next();
   document.write(b.next().value +"<br>");
   // expected output: arr[Output:0 1]
     
</script>

Test it Now

Output: