You're polling setInterval to detect DOM changes. `MutationObserver` fires when they happen.
The DOM can change in ways your code didn't trigger — a third-party widget injects a node, a library adds a class, a rich text editor updates its co…
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A Live KeyboardEvent Inspector — Settling the `event.key` vs `event.code` Question for JS Shortcuts
When you bind Ctrl+S to "save" in a web app, do you check event.key === "s" or event.code === "KeyS" ? The honest answer is "I don't remember, I cop…