JSFiddle - React, Tailwind, and code Playground

HTML

<div class="hey"></div>
<div class="you" id="woah"></div>
<div id="results"></div>

JavaScript

var id = $('div.hey').attr('id');
if (id) {
    $('#results').append('Got an id<br />');
} else {
    $('#results').append('No bueno :(<br />');
}

var anotherId = $('div.you').attr('id');
if (anotherId ) {
    $('#results').append('Got an id<br />');
} else {
    $('#results').append('No bueno :(<br />');
}