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How TO - Overlay


Learn how to create an overlay effect with CSS.


Overlay

Learn how to create an overlay effect:

Overlay

How To Create an Overlay Effect

Step 1) Add HTML:

Use any element and place it anywhere inside the document:

Example

<div id="overlay"></div>

Step 2) Add CSS:

Style the overlay element:

Example

#overlay {
    position: fixed; /* Sit on top of the page content */
    display: none; /* Hidden by default */
    width: 100%; /* Full width (cover the whole page) */
    height: 100%; /* Full height (cover the whole page) */
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5); /* Black background with opacity */
    z-index: 2; /* Specify a stack order in case you're using a different order for other elements */
    cursor: pointer; /* Add a pointer on hover */
}


Step 3) Add JavaScript:

Use JavaScript to turn on and off the overlay effect:

Example

function on() {
    document.getElementById("overlay").style.display = "block";
}

function off() {
    document.getElementById("overlay").style.display = "none";
}
Try it Yourself »

Overlay Effect with Text

Add anything you want inside the overlay, and place it where you want. In this example we add text in the middle of the page:

Example

<style>
#text{
    position: absolute;
    top: 50%;
    left: 50%;
    font-size: 50px;
    color: white;
    transform: translate(-50%,-50%);
    -ms-transform: translate(-50%,-50%);
}
</style>

<div id="overlay">
  <div id="text">Overlay Text</div>
</div>
Try it Yourself »