Preserving Data in Web Pages

Passing data between HTML pages using query parameters raises the issue of data visibility in the URL. Thankfully, there are alternative mechanisms in JavaScript and jQuery for conveying data across pages.

Leveraging HTML5 Storage Objects

To solve this problem, HTML5 provides storage objects like sessionStorage and localStorage. These objects offer a means of temporarily or permanently storing data within the browser's local storage, allowing for convenient retrieval later on.

Session Storage

For temporary data storage within a single browser session, sessionStorage is ideal. Data stored in sessionStorage remains accessible until the session ends (e.g., when the browser tab is closed).

sessionStorage.setItem('label', 'value');
sessionStorage.getItem('label');

Local Storage

For more permanent storage, localStorage is the solution. Data stored in localStorage persists even after the browser is closed and reopened.

localStorage.setItem('label', 'value');
localStorage.getItem('label');

Benefits of HTML5 Storage Objects

• Data remains hidden, avoiding concerns of visibility in the URL.
• Stored values persist across multiple pages and even after browser refreshes (for localStorage).
• Ideal for storing intermediate form data or other essential information that needs to be shared among pages.