JSFiddle - React, Tailwind, and code Playground

by RoryMcCrossan

HTML

<div id="2" class="maindiv">test</div>
<div id="5" class="maindiv">test</div>
<div id="3" class="maindiv">test</div>
<div id="1" class="maindiv">test</div> 
<div class="maindiv">test</div>     
<div id="4" class="maindiv">test</div>

JavaScript

var ids = $("div[id]").map(function() {
    return this.id;
}).get();

var highest = Math.max.apply( Math, ids );
var lowest = Math.min.apply( Math, ids );

alert(highest)
alert(lowest)