JSFiddle - React, Tailwind, and code Playground

HTML

<div class="customers"><br>ABC</div>
<div class="customers"><br>XYZ</div>
<div class="customers"><br></div>
<div class="customers"><br></div>

JavaScript

var elemArray = document.getElementsByClassName('customers');

    for(var i = 0; i < elemArray.length; i++){
       elemArray[i].id = i;
       var elem = document.getElementById(elemArray[i].id);
       var text = elem.innerHTML;
       text = text.toString();
       alert(text);
       if(text=="<br>"){
            alert('bingo');
            elem.style.visibility="hidden";
         }

     }