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What is HTML Web Storage?
HTML Web Storage provides a way to store data in the browser. It offers two main types of storage:
Local Storage:
Data is stored without an expiration date and will not be deleted when the browser is closed.
Session Storage:
Data is stored for a session only, and it is deleted when the browser tab is closed.
Advantages of Web Storage
Storing information locally on the user's computer increases the performance and responsiveness of a web application.
Increased Capacity:
Web storage allows far larger amounts of data storage compared to cookies.
Easy to Use:
The API is very easy to use with simple methods like setItem and getItem.
Using Local Storage
Local Storage can be used by accessing the localStorage object. Below is a basic example of how you might store, retrieve, and remove an item.
// Store
localStorage.setItem("key", "value");
// Retrieve
var value = localStorage.getItem("key");
// Remove
localStorage.removeItem("key");
Using Session Storage
Similar to Local Storage, Session Storage uses the sessionStorage object for managing data within a session duration.
// Store
sessionStorage.setItem("key", "value");
// Retrieve
var value = sessionStorage.getItem("key");
// Remove
sessionStorage.removeItem("key");
Security Considerations
While Web Storage is more secure than cookies, developers must ensure to never store sensitive data directly. User-specific data should always be encrypted before it's stored.
Data Security Tips:
- Always validate the inputted data from users.
- Encrypt sensitive data before storing.
- Consider using libraries like CryptoJS for encryption.
