W3.CSS Dropdowns

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W3.CSS Dropdowns
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Hover Over Me!
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W3.CSS Dropdown Classes
W3.CSS provides the following dropdown classes:

Class Defines
w3-dropdown-hover A hoverable dropdown element
w3-dropdown-content The dropdown part to be displayed
w3-dropdown-click A clickable dropdown element
Dropdown Elements
The w3-dropdown-hover class defines a hoverable dropdown element.

The w3-dropdown-content class defines the dropdown content to be displayed.

Example
<div class="w3-dropdown-hover">
  <button class="w3-button">Hover Over Me!</button>
  <div class="w3-dropdown-content w3-bar-block w3-border">
    <a href="#" class="w3-bar-item w3-button">Link 1</a>
    <a href="#" class="w3-bar-item w3-button">Link 2</a>
    <a href="#" class="w3-bar-item w3-button">Link 3</a>
  </div>
</div>
»

Both the hoverable element and the dropdown content element can be any HTML element.

In the example above the hover element was a <button>, and the dropdown content a <div>.

In the next example the hover element is a <p>, and the dropdown content is a <span>:

Example
<p class="w3-dropdown-hover">Hover over me!
  <span class="w3-dropdown-content w3-green">Hello World!</span>
</p>
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Menu Dropdowns
The w3-dropdown-hover class is perfect for creating navigation bars with dropdown menues:

Home Link 1
 Dropdown
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Example
<div class="w3-bar w3-light-grey">
  <a href="#" class="w3-bar-item w3-button">Home</a>
  <a href="#" class="w3-bar-item w3-button">Link 1</a>
  <div class="w3-dropdown-hover">
    <button class="w3-button">Dropdown</button>
    <div class="w3-dropdown-content w3-bar-block w3-card-4">
      <a href="#" class="w3-bar-item w3-button">Link 1</a>
      <a href="#" class="w3-bar-item w3-button">Link 2</a>
      <a href="#" class="w3-bar-item w3-button">Link 3</a>
    </div>
  </div>
</div>
»
Note: You will learn more about Navigation Bars later in this tutorial.

Clickable Dropdowns
The w3-dropdown-click class creates a clickable dropdown element.

With this class, the dropdown is opened by JavaScript:

Click Me
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Example
<div class="w3-dropdown-click">
  <button onclick="myFunction()" class="w3-button">Click Me!</button>
  <div id="Demo" class="w3-dropdown-content w3-bar-block w3-border">
    <a href="#" class="w3-bar-item w3-button">Link 1</a>
    <a href="#" class="w3-bar-item w3-button">Link 2</a>
    <a href="#" class="w3-bar-item w3-button">Link 3</a>
  </div>
</div>

<script>
function myFunction() {
    var x = document.getElementById("Demo");
    if (x.className.indexOf("w3-show") == -1)
        x.className += " w3-show";
    else
        x.className = x.className.replace(" w3-show", "");
    }
}
</script>
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Image Dropdowns
Move the mouse over the image:


Example
<div class="w3-dropdown-hover">
  <img src="img_fjords.jpg" alt="Norway" style="width:20%">
  <div class="w3-dropdown-content" style="width:300px">
    <img src="img_fjords.jpg" alt="Norway" style="width:100%">
  </div>
</div>
»

Card Dropdowns
Move the mouse over one of the cities below:

London
London is the capital city of England.

It is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.

Tokyo
Tokyo is the capital city of Japan.

13 million inhabitants.

Example
<div class="w3-dropdown-hover">London
  <div class="w3-dropdown-content w3-card-4" style="width:250px">
    <img src="img_london.jpg" alt="London" style="width:100%">
    <div class="w3-container">
      <p>London is the capital city of England.</p>
      <p>It is the most populous city in the UK.</p>
    </div>
  </div>
</div>
»

Animated Dropdown
Use any of the w3-animate-classes to fade, zoom or slide in the dropdown content:

Click Me
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Example
<div class="w3-dropdown-click">
  <button onclick="myFunction()" class="w3-button">Click Me</button>
  <div id="Demo" class="w3-dropdown-content w3-bar-block w3-animate-zoom">
    <a href="#" class="w3-bar-item w3-button">Link 1</a>
    <a href="#" class="w3-bar-item w3-button">Link 2</a>
    <a href="#" class="w3-bar-item w3-button">Link 3</a>
  </div>
</div>
»

Right-aligned Dropdown
Use the w3-right class to float the dropdown to the right. Use CSS to position the dropdown content (right:0  will make the dropdown menu go from right to left instead of left to right):

Hover Over Me
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Example
<div class="w3-dropdown-hover w3-right">
  <button class="w3-button">Dropdown</button>
  <div class="w3-dropdown-content w3-bar-block w3-border" style="right:0">
    <a href="#" class="w3-bar-item w3-button">Link 1</a>
    <a href="#" class="w3-bar-item w3-button">Link 2</a>
    <a href="#" class="w3-bar-item w3-button">Link 3</a>
  </div>
</div>
»


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