JSFiddle - React, Tailwind, and code Playground

by Brunno Romero

HTML

<script src="http://code.jquery.com/jquery-2.1.0.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.14.0/jquery.validate.min.js"></script>
<div>
    <form id="form" action "" method="post">
        <select name="combo">
            <option value="">0</option>
            <option value="1">1</option>
            <option value="2">2</option>
            <option value="3">3</option>
            <option value="4">4</option>
            <option value="5">5</option>
        </select>
        
        <input type="submit" value="enviar" />
    </form>
</div>

JavaScript

$(document).ready(function () {
    
    $("#form").validate({
       rules: {
         // regra é feita pelo name do campo
         combo: "required"           
       }
     });
    
    $("#form").submit(function() {
    
        if($("#form").valid()){
            //sua ação de submit
        	alert("submit o form");        
        }
        
    });
    
})