JSFiddle - React, Tailwind, and code Playground

HTML

<div id="a b">
    <div id="slide_body">
    some content1
    </div>
</div>

<div id="slide2">
    <div id="slide_body">
    some content
    </div>
</div>

JavaScript

console.log($('#a b > #slide_body').html()+"ok");