Activate menu on click

I need help creating a smooth transition effect for opening and closing a menu on my one-page website. I have some JavaScript code to control the menu visibility, but it currently appears abruptly without any transition effects.

Is there a way to add a fade-in-out effect or something similar to make the menu open more smoothly?

 <script>
        function w3_open() {
            document.getElementById("mySidebar").style.visibility = "visible";
        }
        function w3_close() {
            document.getElementById("mySidebar").style.visibility = "hidden";
        }
        </script>
w3-button{
position:fixed; 
    width: 42px;
    height: 42px;
    -moz-border-radius: 50%;
     -webkit-border-radius: 50%;
     border-radius: 50%;
    line-height:1.1;
    text-align:center;
    top:6.5px; 
    left: 8px; 
    background-color: #f2bd66;
    z-index:11;
    background-position:center;
    cursor: pointer;
    color: white;
    margin-top: 0.7%;
    margin-left: 0.7%;
}

.w3-button{
    width: 42px;
    height: 42px;
    margin-top: 0.7%;
    margin-left: 0.7%;
    
}

.w3-button::before {
      content:"☰";
      font-size:32px;
      color:white;
      text-align: center;
    }

.w3-button:hover{
    opacity: 0.6;
    }


 .w3-sidebar {
 position: absolute;
     z-index:12;
     width:188px;
     left: -188px;
     line-height:2;
     position:fixed; 
     border-bottom:.5px solid rgba(204, 158, 90, 1);
     border-top:.5px solid rgba(204, 158, 90, 1);
     background-color:#f2bd66;
     font-family: 'Libre Baskerville', serif;
 font-weight: 400;
     text-align:center;
     color: #5b5f5e;
     height: 100vh;
     border-right:4px solid #af874b; 
     
   }

   
   

.w3-bar-item {
width: 188px;
     margin:0 auto;
     line-height:2;
     border-bottom:.5px solid rgba(204, 158, 90, 1);
     border-top:.5px solid rgba(204, 158, 90, 1);
     background-color:transparent;
     font-family: 'Libre Baskerville', serif;
 font-weight: 400;
     text-align:center;
     color: #5b5f5e;
     float: left;
   }

   #close-menu{
   background-color: #5b5f5e;
   color: white;
   }
   #close-menu:hover{
   opacity: 0.7;
   }

   .nav a:hover {

   background-color: #292446;opacity: 0.9;
   color: white;

   }
<div class="w3-sidebar " style="visibility:hidden" id="mySidebar" >
              <button onclick="w3_close()" class="w3-bar-item w3-large" id="close-menu"> Close &times;</button>
              <nav class="nav">

                <a href="#inicio" class="w3-bar-item" onclick="w3_close()">Inicio</a>
                <a href="#sobremi" class="w3-bar-item" onclick="w3_close()">Sobre mí</a>
                <a href="#galeria" class="w3-bar-item" onclick="w3_close()">Galería</a>
                <a href="#booktub" class="w3-bar-item" onclick="w3_close()">Booktubers GT</a>
                <a href="#recursos" class="w3-bar-item" onclick="w3_close()">Recursos E-stela</a>
                <a href="#contacto" class="w3-bar-item" onclick="w3_close()">Redes Sociales</a>
              </nav>
          </div>

            <div class="w3-teal">
              <button class="w3-button" onclick="w3_open()"></button>
            </div>

javascriptfunctiondrop-down-menumenu

Answer №1

If you're unfamiliar with how to accomplish this in JavaScript, you can achieve it using solely CSS: Toggle class on HTML element without jQuery

If you prefer to use JavaScript for this task, you can toggle a class on your menu container when the button is clicked and implement transitions using CSS based on the toggled class. If you opt for jQuery, you can easily achieve this with a simple fade or slide function:

<script>
  $('#my-menu-button').click(function(){
    $('#my-menu').slideToggle();
  })
</script>

Answer №2

Check out this demo I created for you:

<!DOCTYPE html>
<html lang="en/>
<head>
    <meta charset="UTF-8>
    <title>Demo</title>

    <style>
        .element {
            width: 100px;
            height: 100px;
            background: #000;
            display: block; 
            transition: 1s;
            opacity: 0
        }
        .active {
            opacity: 1
        }

    </style>
</head>
<body>

    <div class="element"></div>

    <button onclick="reveal()">Reveal</button>
    <button onclick="hide()">Hide</button>

    <script>

        var element = document.querySelector('.element')
        function reveal () {
            element.className = 'element active'
        }

        function hide () {
            element.className = 'element'
        }


    </script>
</body>
</html>

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