How to Clear Session Storage Data with Specified Session Storage Item?

Last Updated : 25 Jun, 2024

JavaScript sessionStorage is a web storage technique that allows you to store data in a web browser. You can manually set and retrieve the values from it using some methods. The sessionStorage stores the data for a short amount of time until the browser tab or window gets closed. We will learn how to clear the session storage of a browser using JavaScript by getting the specified session storage item.

Using Window sessionStorage( ) property

We can achieve this by using the Window sessionStorage( ) property. The Window sessionStorage() property saves key/value pairs in a web browser. It stores the key/value pairs in a browser for only one session and the data expires as soon as a new session is loaded.

Syntax

window.sessionStorage

We can clear the session storage by using the clear() method.

sessionStorage.clear()

Example: This example we demonstrates how to manage session storage. It allows users to display, check if the session storage is empty, and clear items. Initial items are set in session storage for demonstration.

HTML

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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" 
          content="width=device-width,
                   initial-scale=1.0">

    <style>
        body {
            text-align: center;
        }

        h1 {
            color: green;
        }
    </style>
</head>

<body style="text-align: center;">
    <h1 style="color: green;">
        GeeksforGeeks
    </h1>

    <h4>
        How to clear session storage data
        with getting the specified session
        storage item?
    </h4>

    <input type="text" id="text">

    <button onclick="display()">
        Display my item
    </button>

    <p id="display"></p>


    <button onclick="isEmpty()">
        Checking if Empty
    </button>
    <button onclick="clear()">
        clear my item
    </button>


    <p id="isEmpty"></p>

    <script>

        // Setting items in the local storage
        sessionStorage.setItem('item1', 'Kotlin');
        sessionStorage.setItem('item2', 'Flutter');
        sessionStorage.setItem('item3', 'React');

        function display() {

            // Getting the text value of input field
            let item = document.getElementById('text').value;

            // Getting particular item from the
            // session storage
            let displayItem = sessionStorage.getItem(item);

            // Checking if key exists or not in 
            // the session storage 
            if (displayItem == null) // If key doesn't exist
            {
                document.getElementById('display')
                    .innerText = 'Key does not exist';
            } else {

                // If it exists
                document.getElementById('display')
                    .innerText = displayItem;

                // Clearing the session storage
                sessionStorage.clear();
            }

        }
        function clear() {
            sessionStorage.clear();

        }

        // Checking if session storage is empty
        function isEmpty() {

            // If session storage is empty
            if (sessionStorage.length == 0)
                document.getElementById('isEmpty')
                    .innerText = 'It is empty';
            else
                document.getElementById('isEmpty')
                    .innerText = 'It is not empty';
        }
    </script>
</body>

</html>