canUpdate static method

bool canUpdate(
  1. Component oldComponent,
  2. Component newComponent
)

Whether the newComponent can be used to update an Element that currently has the oldComponent as its configuration.

An element that uses a given component as its configuration can be updated to use another component as its configuration if, and only if, the two components have runtimeType and key properties that are operator==.

If the components have no key (their key is null), then they are considered a match if they have the same type, even if their children are completely different.

Implementation

static bool canUpdate(Component oldComponent, Component newComponent) {
  return oldComponent.runtimeType == newComponent.runtimeType && oldComponent.key == newComponent.key;
}