JSFiddle - React, Tailwind, and code Playground by mayanksaxena19 November 20, 2015 HTML <div >Type following values and hit enter <ol> <li>test</li> </ol></div> <input type="text" id="name" autocomplete="off"></input> <div id='alertmsg'></div> CSS #alertmsg { color : red; width : 200px; height : 100px; } JavaScript $(function () { function updateName() { var message = ""; if ($('#name').val() == 'test') message = "Name already exists"; $('#alertmsg').text(message); } $('#name').bind("keypress", function (e) { if (e.keyCode == 13) { e.preventDefault(); updateName(); return false; } }); });