JSFiddle - React, Tailwind, and code Playground

by Michel Penke

HTML

<h3 onclick="toggle_visibility('mc_embed_signup');" >Frage 1</h3>

<div id="mc_embed_signup" class="hide">
    <p>Bacon ipsum dolor sit amet prosciutto turducken chicken flank jowl rump chuck. Pancetta ball tip spare ribs, bacon hamburger pork belly turkey t-bone pig.</p>
</div>

CSS

.hide             {display: none;}

JavaScript

function toggle_visibility(id) {
   var e = document.getElementById(id);
   if(e.style.display == 'block')
      e.style.display = 'none';
   else
      e.style.display = 'block';
}
document.getElementById('btn-lokal-anmelden').onclick=function(){
  document.getElementById('mc_embed_signup').classList.add("form-fadein");
}