Specifies the duration of an animation, indicating how long the animation cycle should take to complete.

  • Value: Time in seconds (s) or milliseconds (ms).
  • Default Value: 0s.

Example:

HTML
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* Define an animation with a duration of 2 seconds */
        @keyframes slide-in {
            from {
                transform: translateX(-100%);
            }

            to {
                transform: translateX(0);
            }
        }

        /* Apply the animation with a duration of 2 seconds to an element */
        .element {
            animation-name: slide-in;
            animation-duration: 2s;
            background-color: blue;
            height: 50px;
            width: 50px;
            color: aliceblue;
        }
    </style>
</head>

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

</html>

Output: