I am trying to create a responsive menu with flexbox and I want to animate when it shows up on click on mobile.
<nav class="flex-nav" id="test">
        <a href="#" class="toggle-nav"> ☰Menu</a>
        <ul id="test">
            <li class="item1"><a href="#" >Item1</a></li>
            <li class="item2"><a href="#" >Item2</a></li>
            <li class="social"><a href="#"><i class="fa fa-linkedin"></i></a></li>
            <li class="social"><a href="#"><i class="fa fa-twitter"></i></a></li>
        </ul>
    </nav>
/CSS Code/
    .flex-nav ul{
    display:none;
    -webkit-transition: all 0.5s ease;
    -moz-transition: all 0.5s ease;
    -o-transition: all 0.5s ease;
    transition: all 0.5s ease;
}
.flex-nav ul.open{
    display:flex ;
    }
/jQuery/
$(function(){
        $('#test').on('click', function(){
            $('.flex-nav ul').toggleClass('open');
        }); 
    }); 
Anything I have tried I can't get the animation effect, I tried with the time argument on toggleClass(). Thank You!
 
    