Alternatively merging two arrays - JavaScript

We are required to write a JavaScript function that takes in two arrays and merges the arrays taking elements alternatively from the arrays.

For example −

If the two arrays are −

const arr1 = [4, 3, 2, 5, 6, 8, 9];
const arr2 = [2, 1, 6, 8, 9, 4, 3];

Then the output should be −

const output = [4, 2, 3, 1, 2, 6, 5, 8, 6, 9, 8, 4, 9, 3];

Example

Following is the code −

const arr1 = [4, 3, 2, 5, 6, 8, 9];
const arr2 = [2, 1, 6, 8, 9, 4, 3];
const mergeAlernatively = (arr1, arr2) => {
   const res = [];
   for(let i = 0; i 
Output
This will produce the following output in console −
[
   4, 2, 3, 1, 2, 6,
   5, 8, 6, 9, 8, 4,
   9, 3
]