JSFiddle - React, Tailwind, and code Playground

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">

JavaScript

var Options = {};
function AddItem(key, value)  {
   if(Options[key])
     Options[key].push(value);
   else
     Options[key] = [value];
}

AddItem(2, 5);
AddItem(2, 6);
console.log(Options);