JSFiddle - React, Tailwind, and code Playground

HTML

<span id="s1" class="text block">one</span><br>
<span id="s2" class="text block">two</span><br>
<span id="s2" class="text block">three</span><br>
<div id="test1"></div>
<div id="test2"></div>

JavaScript

var button = 
document.getElementsByClassName('text block');

document.getElementById("test1").innerHTML = button;

console.log(button);
button[0].onclick = function() {
    document.getElementById("test2").innerHTML = 'click';
}