avoid-read-inside-build

added in: 1.4.0

Warns when a read method is used inside of the build method.

read is designed to read the value one time which is, if done inside the build method, can lead to missing the event when the provided value changes.

Example

❌ Bad:

class MyHomePage extends StatelessWidget {
  const MyHomePage();

  @override
  Widget build(BuildContext context) {
    final value = context.read<int>(); // LINT

    return Scaffold(
      ...
    );
  }
}

✅ Good:

class MyHomePage extends StatelessWidget {
  const MyHomePage();

  @override
  Widget build(BuildContext context) {
    final value = context.watch<int>();

    return Scaffold(
      ...
    );
  }
}

Example​

Example