Element classList Property - Toggle between classes to create a dropdown button: - Javascript DOM

Javascript examples for DOM:Element classList

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Description

Element classList Property - Toggle between classes to create a dropdown button:

Demo Code

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<!DOCTYPE html>
<html>
<head>
<style>
.dropbtn {/* w  w  w.jav  a2  s  .  c o  m*/
    background-color: #4CAF50;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

.dropbtn:hover, .dropbtn:focus {
    background-color: #3e8e41;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    overflow: auto;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {background-color: #f1f1f1}

.show {display:block;}
</style>
</head>
<body>

<div class="dropdown">
<button id="myBtn" class="dropbtn">Dropdown</button>
  <div id="myDropdown" class="dropdown-content">
    <a href="#home">Home</a>
    <a href="#about">About</a>
    <a href="#contact">Contact</a>
  </div>
</div>

<script>
document.getElementById("myBtn").onclick = function() {myFunction()};

function myFunction() {
    document.getElementById("myDropdown").classList.toggle("show");
}
</script>

</body>
</html>

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