Why Your Context Doesn’t Work (And How to Fix It)
summary
Explains that BuildContext is the widget’s location in the element tree and why common failures happen: snackBar/bottomSheet errors because the calling context is earlier in the same build; async callbacks crashing because the widget is disposed; and unnecessary full rebuilds from broad dependencies like MediaQuery. Concrete fixes shown with code and inspector: use Builder to get fresh context so scaffold is found, provide Bloc/Cubit above the modal or pass its value into the dialog to avoid missing providers, and check mounted before using context after await; live demo shows the filter sheet works after moving the provider.
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chapters (8)
- 0:00Introduction
- 1:02Context issues in Flutter
- 5:17What is BuildContext
- 11:00Common scope problems
- 15:40Context lifecycle and async
- 18:56Context and performance
- 23:13Live demo: context problems
- 31:45Community resources
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