JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" value=" " id = "marks1" name = "marks1" onblur="myFunction('marks1')"/>

<script>
    var myFunction = function myFunction( txtname ) {
    alert("call");
    var txtobj = document.getElementsByName(txtname);
    alert("my value : "+txtobj[0].value);
}
</script>