JSFiddle - React, Tailwind, and code Playground

HTML

<div>
<textarea name="ctl00$MainContent$QandA$ViewQA$QAListView$ctrl0$ViewQAComment$NewComent" rows="2" cols="20" id="MainContent_QandA_ViewQA_QAListView_ViewQAComment_0_NewComent_0" onkeyup="textEdit(this);"></textarea>
</div>

JavaScript

textEdit = function(Inputelement) {
    debugger;
    var count = Inputelement.value.length;
    var newElement = document.getElementById(Inputelement.id + "_123");
    console.log(newElement);
    if (newElement == null) {
        newElement = document.createElement('div');
        newElement.setAttribute('id', Inputelement.id + "_123");
        newElement.innerHTML = (350 - count) + " letters left";
     
        Inputelement.parentNode.appendChild(newElement, Inputelement)
        console.log("Inner");
    }
    else {
        newElement.innerHTML = (350 - count) + " letters left";
        console.log("Outer");
    }
}