Find the longest sub array of consecutive numbers with a while loop in JavaScript

We are required to write a function with a while-statement that determines the length of the largest consecutive subarray in an array of positive integers.

For instance −

If the input array is −

const input = [6, 7, 8, 6, 12, 1, 2, 3, 4] --> [1,2,3,4]

Then the output should be −

4

If the input array is −

const input = [5, 6, 1, 8, 9, 7] --> [8,9]

Then the output should be −

2

Therefore, let’s write the code for this function −

Example

const arr = [6, 7, 8, 6, 12, 1, 2, 3, 4];
const arr1 = [5, 6, 1, 8, 9, 7];
const findLongestSub = arr => {
   let count = 1, len = 0, max = 1;
   while(len 
Output
The output in the console will be −
4
2