maybeOf static method Null safety

AnimatedListState? maybeOf(
  1. BuildContext context
)

The AnimatedListState from the closest instance of AnimatedList that encloses the given context.

This method is typically used by AnimatedList item widgets that insert or remove items in response to user input.

If no AnimatedList surrounds the context given, then this function will return null.

This method can be expensive (it walks the element tree).

This method does not create a dependency, and so will not cause rebuilding when the state changes.

See also:

  • of, a similar function that will throw if no AnimatedList ancestor is found.

Implementation

static AnimatedListState? maybeOf(BuildContext context) {
  assert(context != null);
  return context.findAncestorStateOfType<AnimatedListState>();
}