vessel for Flutter

For more information about DI itself see vessel

Getting started

Wrap your app in ProviderScope widget:

void main() {
  runApp(
    ProviderScope(child: App())
  );
}

Read your providers with of extension method:

GestureDetector(
  onTap: () => myProvider.of(context).doSomething()
  child: ...
);

Each ProviderScope introduces new ProviderContainer, which becomes child of the previous container. When ProviderScope widget disposes, it disposes ProviderContainer with it.

Overriding and scoping

It's possible to override provider with another one:

ProviderScope(
  overrides: [
    myProvider.overrideWith(anotherProvider),
  ],
  child: ...
)

Or just scope it:

ProviderScope(
  overrides: [
    myProvider.scope(),
  ],
  child: ...
)

Pass parent

ProviderScope takes its parent from the BuildContext. But you could override it with parent constructor parameter.

It could be useful with dialogs:

ProviderScope(
  overrides: [myVmProvider.scoped()],
  child: Builder(
    builder: (context) => GestureDetector(
      onTap: () {
        final container = UncontrolledProviderScope.of(context);
        showAlertDialog(
          builder: (context) => ProviderScope(
            parent: container,
            child: ...
          )
        )
      }, 
      child: ...
    )
  )
)

Now your dialog will receive all scoped providers from the parent screen.