The main difference between `localStorage` and `sessionStorage`

The main difference between localStorage and sessionStorage lies in how long the data is stored and where it's accessible. Here's a detailed comparison:

🗂️ 1. Persistence Duration

Feature	`localStorage`	`sessionStorage`
Lifespan	Persists even after the browser/tab is closed	Data is cleared when the tab is closed
Use Case	For data that should persist between sessions	For temporary data needed during a session

🌐 2. Scope of Access

Feature	`localStorage`	`sessionStorage`
Tab/Window Sharing	Shared across all tabs/windows from the same origin	Unique to the specific tab or window
Example	Login token accessible in all tabs	Shopping cart limited to one tab

📦 3. Storage Capacity

Feature	`localStorage` & `sessionStorage`
Capacity	Around 5MB (varies by browser)
Storage Type	Stores only strings

To store objects:

// Storing
localStorage.setItem("user", JSON.stringify(userObj));

// Retrieving
const user = JSON.parse(localStorage.getItem("user") || '{}');

🔐 4. Security

Both are vulnerable to XSS (Cross-Site Scripting) attacks.
Neither should store sensitive data like passwords directly.

✅ When to Use Which?

Use Case	Recommended Storage
Login sessions that persist on refresh	`localStorage`
Temporary form data within one tab	`sessionStorage`
Remembering user preferences/settings	`localStorage`
One-time flow data (e.g., survey step)	`sessionStorage`

Summary

Feature	localStorage	sessionStorage
Persist Across Tabs	✅ Yes	❌ No
Persist After Refresh	✅ Yes	✅ Yes
Persist After Closing Tab	✅ Yes	❌ No
Use Case	Long-term storage	Tab/session-specific

Happy Coding!

Renuka Patil @renukapatil

The main difference between `localStorage` and `sessionStorage`

🗂️ 1. Persistence Duration

🌐 2. Scope of Access

📦 3. Storage Capacity

🔐 4. Security

✅ When to Use Which?

Summary

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