html web storage - Wikitechy https://www.wikitechy.com/interview-questions/tag/html-web-storage/ Interview Questions Thu, 29 Feb 2024 13:34:27 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png html web storage - Wikitechy https://www.wikitechy.com/interview-questions/tag/html-web-storage/ 32 32 What are the different types of storage in HTML5 ? https://www.wikitechy.com/interview-questions/html/what-are-the-different-types-of-storage-in-html5/ https://www.wikitechy.com/interview-questions/html/what-are-the-different-types-of-storage-in-html5/#respond Wed, 26 Oct 2022 11:34:59 +0000 https://www.wikitechy.com/interview-questions/?p=5049
  • In HTML5, web storage is one of the great features. In Web storage, web applications can locally store data within the browser on the client side.
  • It is sometimes known as DOM storage and stores data in the form of key/value pair on the browser.
  • Web storage is better and faster than cookies storage, and storing data is similar to cookies.
  • Similarly, Web Storage can use storage space of up to 5MB per domain.
  • It is faster than cookies storage because It will not send data to the server side.
  • At web storage cookies data expires after some time or session but data stored by local Storage never expires.
  • There are two types of web storage, they are;
    • Local Storage
    • Session Storage
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    • Local Storage

    • In this the local Storage object stores data locally within the browser.
    • The data stored by local Storage object does not have any expiration date.
    • The stored data will not be deleted if the browser is reopened or closed.
    • The key/values are always stored as String, and can be accessed with localStorage.setItem() and localStorage.getItem() methods.

    Sample Code

    <!DOCTYPE html>
    <html>
    <head>
      <title>Web Storage API</title>
      <style>
        body{
          color: blue;
          text-align: center;
          font-size: 30px;
          margin-top: 30px;
          font-style: italic;
        }
      </style>
    </head>
    <body>
    <script>
     if(typeof(Storage)!=="undefined") {
      localStorage.setItem("name","Venkat");
      localStorage.setItem("Country", "India");
       document.write("Hi this is"+" "+localStorage.name+" "+"from" +" "+ localStorage.Country);
    }
     else{
      alert("Sorry! your browser is not supporting the browser")
     }
    </script>
    </body>
    </html>

    Output

    Session Storage

    • The session storage is same as local storage, but session storage stores data only for one session.
    • If you close the browser, then data will be deleted or lost.

    Sample Code

    <!DOCTYPE html>
    <html>
    <head>
    <script>
    function clickCounter() {
      if (typeof(Storage) !== "undefined") {
        if (sessionStorage.clickcount) {
          sessionStorage.clickcount = Number(sessionStorage.clickcount)+1;
        } else {
          sessionStorage.clickcount = 1;
        }
        document.getElementById("result").innerHTML = "You have clicked the button " + sessionStorage.clickcount + " time(s) in this session.";
      } else {
        document.getElementById("result").innerHTML = "Sorry, your browser does not support web storage...";
      }
    }
    </script>
    </head>
    <body>

    <p><button onclick="clickCounter()" type="button">Click me!</button></p>
    <div id="result"></div>
    <p>Click the button to see the counter increase.</p>
    <p>Close the browser tab (or window), and try again, and the counter is reset.</p>

    </body>
    </html>

    Output

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