JSFiddle - React, Tailwind, and code Playground

by Gereltod Gotsbayar

HTML

<div id="container">
    <span class="item">1</span>
    <span class="not-item">2</span>
    <span class="item">3</span>
    <span class="item">4</span>
    <span class="item">5</span>
</div>

JavaScript

if ($("#container").children(".item").size()) {
    alert($("#container").children(".item").size());
}