𝗪𝗲𝗯𝗦𝗼𝗰𝗸𝗲𝘁𝘀 𝗥𝗲𝘃𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝗶𝘇𝗲 𝗥𝗲𝗮𝗹-𝗧𝗶𝗺𝗲 𝗪𝗲𝗯
You watch a live sports score update without refreshing your page. You edit a document and see your teammate's changes instantly.
These experiences happen because of WebSockets.
WebSockets create a constant connection between a server and a client. This allows both sides to send data at any time.
How it differs from HTTP:
HTTP works like a question and answer session. One side asks, and the other responds. This process repeats for every single piece of data.
WebSockets work like a two-way conversation. Both parties speak freely without waiting for a prompt.
Key benefits of WebSockets:
- Low latency: Data moves fast with minimal delay.
- Bidirectional: Both the server and the client send data.
- Persistent: The connection stays open, so you do not repeat requests.
- Efficient: You save bandwidth by reducing header overhead.
Common uses for WebSockets:
- Live sports scores and stock prices.
- Chat apps like Slack or WhatsApp.
- Multiplayer gaming.
- Collaborative tools.
When to use HTTP instead:
Use HTTP for simple tasks. If your app only needs to fetch data once and does not need instant updates, HTTP is better.
Security tip: Always use wss:// instead of ws:// to keep your data safe.
If you build large apps, use load balancers to manage many connections. You can also combine WebSockets for live data with HTTP for standard requests.
Source: https://dev.to/abdullah_bajwa_2072d8a81b/websockets-revolutionize-37e8