Local Storage, Session Storage And Cookies

When building modern web applications, managing client-side storage is an essential part of development. Three common tools for this purpose are Local Storage, Session Storage, and Cookies. Each has its own strengths and use cases. Here’s a breakdown of these technologies to help you understand and choose the right one for your needs.

1. Local Storage

Definition: Local Storage is a web storage API provided by browsers that allows developers to store key-value pairs directly in a user’s browser.

Characteristics:

. Capacity: Up to 5MB in most browsers.

• Persistence: Data remains even after the browser is closed or the system is restarted.
• Scope: Data is available only on the domain that stored it.
• Storage Format: Data is stored as strings.

Use Cases:

• Storing user preferences (e.g., theme settings).
• Caching data for offline use.
• Keeping non-sensitive data that doesn’t require frequent updates.

Code Example:

// Save data to Local Storage
localStorage.setItem(‘username’, ‘JohnDoe’);

// Retrieve data from Local Storage
const username = localStorage.getItem(‘username’);