zig Tryit Editor

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.dropbtn {
  background-color: #3498DB;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}
.dropbtn:hover, .dropbtn:focus {
  background-color: #2980B9;
}
.dropdown {
  position: relative;
  display: inline-block;
}
.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f1f1f1;
  min-width: 160px;
  overflow: auto;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}
.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}
.dropdown a:hover {background-color: #ddd;}
.show {display: block;}
</style>
</head>
<body style="background-color:white;">
<h2>Clickable Dropdown</h2>
<p>Click on the button to open the dropdown menu.</p>
<div class="dropdown">
  <button onclick="myFunction()" 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>
  /* When the user clicks on the button, 
  toggle between hiding and showing the dropdown content */
  function myFunction() {
    document.getElementById("myDropdown").classList.toggle("show");
  }
  // Close the dropdown if the user clicks outside of it
  window.onclick = function (event) {
    if (!event.target.matches('.dropbtn')) {
      var dropdowns = document.getElementsByClassName("dropdown-content");
      var i;
      for (i = 0; i < dropdowns.length; i++) {
        var openDropdown = dropdowns[i];
        if (openDropdown.classList.contains('show')) {
          openDropdown.classList.remove('show');
        }
      }
    }
  }
</script>
</body>

</html>