JSFiddle - React, Tailwind, and code Playground

by maleol

HTML

<script
  src="https://code.jquery.com/jquery-3.3.1.js"
  integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60="
  crossorigin="anonymous"></script>
<form name="contato" id="formcontato" method="post" action="">
	  <label>Nome:</label>
	  <input name="nome" type="text" id="nome" size="30" maxlength="50" /><br /><br />
	  <input  type="submit" name="submit" value="Enviar" />  
 </form>

JavaScript

$(document).ready(function(){
	$("#your-profile").submit(function(){
		var msg = "";
	  if($('#cpf').val() == ''){
	  	msg +="Preencha o campo nome";
	  }
	  if(msg != ""){
	  	alert(msg);
	    return false;
	  }
    else {
	    return true;
	  }
	});
});