How can I push an element of array in desired position in JavaScript?

Question

I created an array named 'arr' with four elements.

var arr = ["apple", "ball", "cat", "elephant"];

How can I push an element in the exact location (here, [3])? The results should be:

var arr = ["apple", "ball", "cat", "dog", "elephant"];

Answer 1

Use splice:

arr.splice(2, 0, "cat");