“Using a Field Strategy” documentation

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I found an issue in this Lit Binder Field Strategy Docs. Using Vaadin 24.6.12.

When overriding the getFieldStrategy method and no model?: AbstractModel is given to the super call, the Checkbox value binding is broken. Changing the value in the form does result in a wrong value put in the bean:

• true/checked is false
• false/not checked is undefined

Suggested change in the documentation would be:

  override getFieldStrategy(element: any, model?: AbstractModel): FieldStrategy {
    if (element.localName === 'my-text-field' && model instanceof StringModel) {
      return new MyTextFieldStrategy(element);
    }
-  return super.getFieldStrategy(element);
+  return super.getFieldStrategy(element, model);
  }
}

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Open the linked Lit Binder Field Strategy documentation and go to the “Using a Field Strategy” section. Update the example so the overridden getFieldStrategy method passes model to the superclass, then verify that the example reflects the reported Checkbox binding behavior and preserves the custom text-field strategy.