JSFiddle - React, Tailwind, and code Playground

HTML

<form id='theForm'>
    <button type="button" onclick="cre();">+</button>
    <button type="button" onclick="del();">-</button>
    <button type="button" onclick="delForm();">delForm</button>
</form>

JavaScript

cre = function() {
    var form = document.getElementById('theForm'),
        div = document.createElement('div'),
        t = document.createElement('select'),
        label = document.createElement('label'),
        textbox = document.createElement('input');
    
    div.className = 'divContainer';
    div.appendChild(t);
    div.appendChild(label);
    div.appendChild(textbox);
    form.appendChild(div);
}

/*{delete t,form,label,textbox;}*/
delForm = function() {
    var form = document.getElementById('theForm');
    form.parentNode.removeChild(form);
}

del = function() {
	var containers = document.getElementsByClassName('divContainer');
    for(var i = 0; i < containers.length; i++) {
         if(typeof(containers[i]) === 'object') {
             containers[i].parentNode.removeChild(containers[i]);
         }
	 }
}