JSFiddle - React, Tailwind, and code Playground

JavaScript

var a = [2,3,5];

function max(numArray) 
{
    var nums = numArray.slice();
	if (nums.length == 1) { return nums[0]; }
    if (nums[0] < nums[1]) { nums.splice(0,1); }
    else { nums.splice(1,1); }
    return max(nums);
}

alert(max(a));