How to Create Full Screen Overlay Navigation Bar using HTML CSS and JavaScript ?

Last Updated : 24 Apr, 2020

Create a full screen Navigation Bar: In this article, you will learn how to create a full-screen navbar for your website. There are three methods to create a full screen overlay navigation bar which are listed below:

From Left
From top
No animation- Just show

You will be required to create two divs. One for the overlay container and the other for the overlay content container. Step 1: The first step is to create an HTML file.

html

<div id="myNav" class="overlay">

    <!-- Button to close the overlay navigation -->
    <a href="javascript:void(0)" class="closebtn"
        onclick="closeNav()">&times;
    </a>

    <!-- Overlay content -->
    <div class="overlay-content">
        <a href="#">About</a>
        <a href="#">Services</a>
        <a href="#">Clients</a>
        <a href="#">Contact</a>
    </div>
</div>

<!-- Use any element to open/show the
    overlay navigation menu -->
<span onclick="openNav()">open</span></div>

Step 2: Add CSS to the file.

css

<style>
    overlay {
        height: 100%;
        width: 0;
        position: fixed;
        ] z-index: 1;
        left: 0;
        top: 0;
        background-color: rgb(0, 0, 0);
        background-color: rgba(0, 0, 0, 0.9);
        overflow-x: hidden;
        transition: 0.5s;
    }

    ].overlay-content {
        position: relative;
        top: 25%;
        width: 100%;
        text-align: center;
        margin-top: 30px;
    }

    .overlay a {
        padding: 8px;
        text-decoration: none;
        font-size: 36px;
        color: #818181;
    
        /* Display block instead
            of inline */
        display: block;
        
        /* Transition effects
            on hover (color) */
        transition: 0.3s;
    }

    .overlay a:hover,
    .overlay a:focus {
        color: #f1f1f1;
    }

    .overlay .closebtn {
        position: absolute;
        top: 20px;
        right: 45px;
        font-size: 60px;
    }

    @media screen and (max-height: 450px) {
        .overlay a {
            font-size: 20px
        }

        .overlay .closebtn {
            font-size: 40px;
            top: 15px;
            right: 35px;
        }
    }
</style>

Step 3: In the final step add JavaScript to the files.

javascript

<script>
    function openNav() {
        document.getElementById("myNav").style.width = "100%";
    }

    function closeNav() {
        document.getElementById("myNav").style.width = "0%";
    }

    //or

    function openNav() {
        document.getElementById("myNav").style.display = "block";
    }

    function closeNav() {
        document.getElementById("myNav").style.display = "none";
    }
</script>

Example 1: This example creating the Full Screen Overlay Navigation Bar from left.

html

<!DOCTYPE html>
<html>

<head>
    <meta name="viewport" content="width=device-width, 
               initial-scale=1">
    <style>
        .overlay {
            height: 100%;
            width: 0;
            position: fixed;
            top: 0;
            left: 0;
            background-color: #1a6e1a;
            overflow-x: hidden;
            transition: 1.0s;
        }

        .overlay-content {
            position: relative;
            top: 25%;
            width: 100%;
            text-align: center;
        }

        .overlay a {
            padding: 10px;
            text-decoration: none;
            font-size: 40px;
            color: white;
            display: block;
            transition: 0.3s;
        }

        .overlay a:hover,
        .overlay a:focus {
            color: black;
        }

        .overlay .closebtn {
            position: absolute;
            top: 10px;
            right: 35px;
            font-size: 70px;
        }
    </style>
</head>

<body>

    <div id="myNav" class="overlay">
        <a href="javascript:void(0)" 
            class="closebtn" onclick="closeNav()">
            &times;
        </a>
        <div class="overlay-content">
            <a href="#">About</a>
            <a href="#">Practice</a>
            <a href="#">Courses</a>
            <a href="#">Contact</a>
        </div>
    </div>

    <span style="font-size:35px;cursor:pointer"
        onclick="openNav()">
        &equiv;
    </span>

    <h2>GeeksForGeeks</h2>

    <p>
        Click on the nav bar icon 
        to see full screen overlay:
    </p>

    <script>
        function openNav() {
            document.getElementById(
                "myNav").style.width = "100%";
        }

        function closeNav() {
            document.getElementById(
                "myNav").style.width = "0%";
        }
    </script>
</body>

</html>

Output:

Example 2: This example creating the Full-Screen Overlay Navigation Bar from the top.

html

<!DOCTYPE html>
<html>

<head>
    <meta name="viewport" content="width=device-width,
               initial-scale=1">
    <style>
        .overlay {
            height: 0%;
            width: 100%;
            position: fixed;
            top: 0;
            left: 0;
            background-color: #1a6e1a;
            overflow-y: hidden;
            transition: 1.0s;
        }

        .overlay-content {
            position: relative;
            top: 25%;
            width: 100%;
            text-align: center;
        }

        .overlay a {
            padding: 10px;
            text-decoration: none;
            font-size: 40px;
            color: white;
            display: block;
            transition: 0.3s;
        }

        .overlay a:hover,
        .overlay a:focus {
            color: black;
        }

        .overlay .closebtn {
            position: absolute;
            top: 10px;
            right: 35px;
            font-size: 70px;
        }
    </style>
</head>

<body>

    <div id="myNav" class="overlay">
        <a href="javascript:void(0)"
            class="closebtn" onclick="closeNav()">
            &times;
        </a>
        <div class="overlay-content">
            <a href="#">About</a>
            <a href="#">Practice</a>
            <a href="#">Courses</a>
            <a href="#">Contact</a>
        </div>
    </div>
    
    <span style="font-size:35px;cursor:pointer" 
            onclick="openNav()">
        &equiv;
    </span>

    <h2>GeeksForGeeks</h2>

    <p>
        Click on the nav bar icon
        to see full screen overlay:
    </p>

    <script>
        function openNav() {
            document.getElementById(
                "myNav").style.height = "100%";
        }

        function closeNav() {
            document.getElementById(
                "myNav").style.height = "0%";
        }
    </script>
</body>

</html>

Output:

Example 3: This example creating the Full-Screen Overlay Navigation Bar without animation.