JSFiddle - React, Tailwind, and code Playground

HTML

<div class="para">Hello1</div>
<div class="para">Hello2</div>
<div class="para">Hello3</div>
<div class="para">Hello4</div>
<div class="para">Hello5</div>

CSS

.exeInputapparition{
  width:100px;
  background:red;
  color:black;
  margin-top:5px;
  
}

JavaScript

var x=document.querySelectorAll(".para");
for(var a =0;a<x.length;a++){
x[a].classList.add("exeInputapparition")
}