JSFiddle - React, Tailwind, and code Playground

HTML

<h3>Heading 1</h3>
<span>Heading 1: Span 1</span>
<span>Heading 1: Span 2</span>
<span>Heading 1: Span 3</span>

<h3>Heading 2</h3>
<span>Heading 2: Span 1</span>

JavaScript

$('h3').on('click', function() {
   $(this).nextUntil('h3').toggle(); 
});