How Browsers Store Data
Browsers do more than show websites. They act as local data managers. They store information on your device to make browsing faster and easier.
You should know the three main ways browsers store data:
• Cookies • Browser Cache • Web Storage
Cookies Cookies are small text files. Websites use them to remember you. They store your login sessions and language settings.
How they work:
- You visit a site.
- The site sends a cookie to your browser.
- Your browser saves it.
- On your next visit, your browser sends that cookie back to the server.
Keep in mind:
- Cookies have a tiny limit of 4KB.
- They get sent with every request, which can slow things down.
- Never store passwords in cookies.
Browser Cache Cache stores heavy files like images, CSS, and JavaScript. Its goal is speed.
How it works:
- You visit a site for the first time.
- Your browser downloads all files and saves them in the cache.
- Next time you visit, the browser loads files from your device instead of the internet.
Benefits:
- Pages load much faster.
- It uses less internet bandwidth.
- It reduces the load on the server.
Web Storage This is an HTML5 feature. It lets sites store data as key-value pairs. It is more efficient than cookies because it does not get sent to the server with every request.
There are two types:
- Local Storage: Data stays even if you close the browser. It holds about 5MB to 10MB.
- Session Storage: Data disappears when you close the tab.
Use cases:
- Local storage is great for dark mode settings.
- Session storage works well for temporary form data.
Summary
- Use Cookies for login sessions and server communication.
- Use Cache to speed up site loading with static assets.
- Use Web Storage for larger amounts of client-side data.
Source: https://dev.to/dailycodetools/how-browser-stores-data-cookies-cache-storage-25-jun-0346-m7h