JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main1">
   <div class="sub1"></div>
   <div class="sub2">
     <div id="sub_sub"></div>
   </div>
   <div class="sub3"></div>   
</div>

JavaScript

$('div').each(function(){
    if($(this).attr('id')!=undefined)
        console.log($(this).attr('id'));
    else
        console.log($(this).attr('class'));
});