JSFiddle - React, Tailwind, and code Playground

JavaScript

var arraylist = [0, 1, null, 5];
var i = arraylist.length;
var j =0;
var newlist = [];

while(j < i){

if(arraylist[j] != null){

	newlist.push(arraylist[j]);

}

j++;
}

console.log(newlist);