JSFiddle - React, Tailwind, and code Playground

HTML

<input id="edValue" type="text" onKeyUp="edValueKey()">

JavaScript

function edValueKey()
{
    //var moninput = document.getElementById("edValue").value;
    var monTexte = 'This is my test';
    var cptTexte = document.getElementById("edValue").value;
    cptTexte = cptTexte.length;
    //alert(cptTexte);
    document.getElementById("edValue").value = monTexte.substr(0, cptTexte);
    //document.getElementById("edValue").innerHTML = 'yuty';
}