WebSocket CORS Handshake Failure: Silent Fallback
WebSocket handshake fails silently due to CORS misconfiguration - app falls back to long polling.
Imagine you ordered pizza and had to keep calling the restaurant every 30 seconds to ask 'Is it ready yet?' — that's how old-school web apps work. WebSockets are like the restaurant calling YOU the moment your pizza is done. The phone line stays open the entire time, and either side can talk whenever they want. That's it — one persistent, open conversation instead of thousands of one-off requests.
Every time you see a live sports score update without refreshing the page, watch a chat message appear instantly, or see your cursor mirrored on a collaborative whiteboard, WebSockets are almost certainly doing the heavy lifting. They're the backbone of any experience on the web that feels genuinely alive — and understanding them separates developers who can build real-time features from those who fake it with hacks.
What is WebSockets Explained?
WebSockets Explained is a core concept in CS Fundamentals. Rather than starting with a dry definition, let's see it in action and understand why it exists.
Key takeaways
Frequently Asked Questions
That's Computer Networks. Mark it forged?
3 min read · try the examples if you haven't