JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wpq2">
    <div class="subClass"> 
        <a id="linkTO" class="subClass">New Item</a>
        or 
        <a class="subClass">edit</a>
        this list
    </div>
</div>

JavaScript

var parentID = document.getElementById('wpq2');
//get the first inner DIV which contains all the a elements
var innerDiv = parentID.getElementsByClassName('subClass')[0];
//get all the a elements
var subs = innerDiv.getElementsByClassName('subClass');

//This will hide all matching elements except the first one
for(var i = 1; i < subs.length; i++){
   var a = subs[i];
   a.style.display = 'none';
}