JSFiddle - React, Tailwind, and code Playground

HTML

<button onclick="duzinaNiza()">Do it!</button>

JavaScript

var xArray=[];

var a1=50;
var a2=70;

InsertIntoArray(a1,'#fff');
InsertIntoArray(a2,'#fff');

function InsertIntoArray(x,y)
{
var yArray=[x,y];

xArray.push(yArray);

}

alert(xArray);