Should I use polling or WebSockets in React?
Use polling for infrequent updates where a slight delay is fine, like a notification count every 30 seconds. Use WebSockets for frequent, instant updates like live chat, live scores, or collaboration, where low latency and efficiency matter.
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A persistent two-way connection between client and server where the server can push updates instantly without the client asking. They are efficient for frequent updates and are often used via Socket.IO for reconnection and rooms.
Because it works over plain HTTP with a simple interval the client controls. WebSockets require a WebSocket server and add complexity for connection management, reconnection, and rooms. Polling is simpler to set up.
When updates are frequent and need to feel instant: live chat, live scores, collaboration tools. For these, the low latency and efficiency of WebSockets outweigh the setup cost. For infrequent updates, polling is simpler.
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