JSFiddle - React, Tailwind, and code Playground

HTML

<body onload="showDiv()">
<div id="list">testing</div>
</body>
<script>
function showDiv() { 
    alert(document.getElementById('list').innerHTML);
    if( document.getElementById('list').value == "test123") {
        alert("match");
        document.getElementById('passdiv').hidden = true;
        document.getElementById('list').hidden = false;
    } else {
         alert("Password is incorrect.");
    }

}
</script>