Connection Fallback Error Block for React

No. It runs a script: Trying WebSocket for 800 ms, then "Still blocked" on the first press and "WebSocket restored, in this demo" on the second, so a viewer can see both outcomes and neither is an accident. To wire it, open your real socket where the code says so, keep the busy state until it connects or fails, and show the failure's reason; keep the three rows, which are computed from the stage and the toggle.

Because that is what a real client does. It tries a WebSocket, falls back to server-sent events when a proxy or firewall blocks it, and then to polling on a timer, which almost always works. Showing the ladder tells people their edits are still safe and updating, only slower. The rows are typed in ROWS, and their words come from one helper, so adding a fourth is one entry and one case.

By shape and word: a solid square for connected or active, a cross for lost, a circle with a slash for blocked and a dashed circle for standby or trying, with heavier type for the worse states. The signal bars say the same in heights: one lit while the app polls, all three when the WebSocket is back. The pulse runs three times on load and stops, and not at all with reduced motion.

Tab reaches Reconnect now and the second button, which keeps its width as its label changes (Keep using polling, Polling is kept, Break it again) and reports its pressed state. The result line under them is a polite status message, and when an attempt ends, focus moves to it, because the busy button drops focus.

The page says so about a typed count; it keeps nothing. In your app, say it only if your client queues edits locally (an outbox in IndexedDB, for example) and flushes them when the connection returns, and show the real count.

The bars, the headline and the buttons come first; the buttons wrap onto two lines if they must, and each transport row stacks its name over its state. Nothing scrolls sideways down to 320 px.