Maintaining Data Integrity Across HTML Pages in JavaScript

When transferring data between web pages, the traditional approach of using query parameters (e.g., "http://localhost/project/index.html?status=exist") can leave sensitive information exposed in the URL. To address this concern, developers seek alternative methods for securely exchanging data.

One viable solution is to utilize HTML5 storage objects such as sessionStorage or localStorage. These objects provide a robust mechanism for storing key-value pairs locally, enabling data persistence across multiple pages.

Session Storage

For temporary storage within a single session, sessionStorage can be leveraged. To store data using sessionStorage:

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

To retrieve stored data:

sessionStorage.getItem('label');

Local Storage

For more permanent storage, localStorage can be employed. To store data using localStorage:

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

To retrieve stored data:

localStorage.getItem('label');

This approach offers several advantages:

• Data Protection: Sensitive information is not exposed in the URL.
• Persistence: Data remains available even after page reloads or browser closures.
• Cross-Page Accessibility: Stored data can be accessed from any page within the same domain.

By leveraging HTML5 storage objects, developers can effectively exchange data between HTML pages, while safeguarding data privacy and maintaining application continuity.