What are the storage mechanisms in Chrome browser?

Chrome Storage Mechanisms

Chrome browser provides multiple storage mechanisms to meet data storage needs in different scenarios.

Storage Types

1. LocalStorage

   • Capacity: Approximately 5-10MB
   • Persistent storage, data doesn't expire
   • Shared across same-origin pages
   • Can only store string types

2. SessionStorage

   • Capacity: Approximately 5-10MB
   • Session-level storage, data expires when page closes
   • Not shared across same-origin pages
   • Can only store string types

3. IndexedDB

   • Capacity: Typically 50% of available disk space
   • Persistent storage, supports large amounts of data
   • Supports transactions and indexes
   • Can store objects, arrays, and other complex data types

4. Cookies

   • Capacity: Approximately 4KB
   • Can set expiration time
   • Sent to server with every request
   • Supports HttpOnly and Secure attributes

5. Web SQL (Deprecated)

   • SQL-based database
   • Replaced by IndexedDB
   • Not recommended for new projects

Use Cases

• LocalStorage: User preferences, theme selection
• SessionStorage: Temporary form data, page state
• IndexedDB: Offline applications, large data storage
• Cookies: User authentication, session management

Best Practices

• Choose appropriate storage method based on data size and access frequency
• Use HttpOnly cookies for sensitive data
• Use IndexedDB for large data
• Regularly clean expired data
• Be aware of storage quota limits