Error boundaryvsGraceful degradation

Error boundary

one component threw and you showed a fallback for that section instead of a blank white page.

A component that catches errors thrown during rendering below it and shows a fallback instead of unmounting the whole tree. It is the only thing standing between a null-dereference in a widget and an empty document. It does not catch errors in event handlers, in async callbacks or on the server, which is why teams that add boundaries still get blank pages from the paths boundaries cannot see.