Function HotSwap

src/py/reactpy/reactpy/testing/backend.py:199–210

()

        @component
        def HotSwap() -> Any:
            # new displays will adopt the latest constructor and arguments
            constructor, _set_constructor = use_state(lambda: constructor_ref.current)
            set_constructor = use_callback(lambda new: _set_constructor(lambda _: new))

            def add_callback() -> Callable[[], None]:
                set_constructor_callbacks.add(set_constructor)
                return lambda: set_constructor_callbacks.remove(set_constructor)

            use_effect(add_callback)

            return constructor()

        def swap(constructor: Callable[[], Any] | None) -> None:
            constructor = constructor_ref.current = constructor or (lambda: None)