BuildContext Explained | Flutter for Web Developers
Understand how to use BuildContext as an Web Developer
What’s BuildContext?
A handle to the location of a widget in the widget tree.
Check the official documentation for more.
BuildContext explained for Web Developers
The BuildContext class presents a set of methods that can be used from StatelessWidget.build methods and from methods on State objects. BuildContext objects are passed to WidgetBuilder functions and are available from the State.context member.
Example Code
Here is an example of how to use BuildContext:
@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: const Text('Demo')), body: Builder( builder: (BuildContext context) { return TextButton( child: const Text('BUTTON'), onPressed: () { Scaffold.of(context).showBottomSheet( (BuildContext context) { return Container( alignment: Alignment.center, height: 200, color: Colors.amber, child: Center( child: Column( mainAxisSize: MainAxisSize.min, children: [ const Text('BottomSheet'), ElevatedButton( child: const Text('Close BottomSheet'), onPressed: () { Navigator.pop(context); }, ) ], ), ), ); }, ); }, ); }, ) ); }BuildContext Remarks
The BuildContext for a particular widget can change location over time as the widget is moved around the tree. Therefore, values returned from the methods on this class should not be cached beyond the execution of a single synchronous function.
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