JSFiddle - React, Tailwind, and code Playground

HTML

<form name="form">
    Please enter your full name <input type="text" id="name"/><br>
    <input type="button" value="show name" onclick="showName()">
</form>
<script>
    function showName() {
        var name = document.getElementById("name").value;
        alert("Your name: " + document.getElementById("name").value);
    }
</script>