JSFiddle - React, Tailwind, and code Playground

HTML

<span class="rptLabels" > sample</span>
<span class="rptLabels">sedfsdfs</span>
<span class="rptLabels">wrtertergedfgdfg</span>
<span class="rptLabels">ngjkhjghmnbnmbnm</span>

JavaScript

var elemArray = document.getElementsByClassName('rptLabels');
for(var i = 0; i < elemArray.length; i++){
    var elem = elemArray[i]; // this will be your label
    alert(elem.innerText); 
};