JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="test">
<input type="text" id="test1">

JavaScript

$(document).keyup(function (e) {
            if (e.which == 13) {
                var s = $(document.activeElement).id;
                alert(s);
                //doPostBack($(":focus").id);               //doPostBack("#ctl00_MainContent_gvListPasses_btSearch");            
            }                
        });