JSFiddle - React, Tailwind, and code Playground

HTML

<p><input id="editvalue" type="text"></p>
<p>The text box contains: <span id="labelvalue"></span></p>

JavaScript

function UpdateDisplay()
{
    var inputelem = document.getElementById("editvalue");
    var s = inputelem.value;
    
    var labelelem = document.getElementById("labelvalue");
    labelelem.innerText = s;
}

// Initial update.
UpdateDisplay();

// Register event handlers.
var inputelem = document.getElementById("editvalue");
inputelem.addEventListener('keypress', UpdateDisplay);
inputelem.addEventListener('keyup', UpdateDisplay);
inputelem.addEventListener('input', UpdateDisplay);
inputelem.addEventListener('change', UpdateDisplay);