Function EventChain

tests/integration/test_event_chain.py:20–307

App with chained event handlers.

()

def EventChain():
    """App with chained event handlers."""
    import asyncio
    import time

    import reflex as rx

    # repeated here since the outer global isn't exported into the App module
    MANY_EVENTS = 50

    class State(rx.State):
        event_order: list[str] = []
        interim_value: str = ""
        cond_input: str = ""

        @rx.event
        def event_no_args(self):
            self.event_order.append("event_no_args")

        @rx.event
        def event_arg(self, arg):
            self.event_order.append(f"event_arg:{arg}")

        @rx.event
        def event_arg_repr_type(self, arg):
            self.event_order.append(f"event_arg_repr:{arg!r}_{type(arg).__name__}")

        @rx.event
        def event_nested_1(self):
            self.event_order.append("event_nested_1")
            yield State.event_nested_2
            yield State.event_arg("nested_1")

        @rx.event
        def event_nested_2(self):
            self.event_order.append("event_nested_2")
            yield State.event_nested_3
            yield rx.console_log("event_nested_2")
            yield State.event_arg("nested_2")

        @rx.event
        def event_nested_3(self):
            self.event_order.append("event_nested_3")
            yield State.event_no_args
            yield State.event_arg("nested_3")

        @rx.event
        def on_load_return_chain(self):
            self.event_order.append("on_load_return_chain")
            return [State.event_arg(1), State.event_arg(2), State.event_arg(3)]

        @rx.event
        def on_load_yield_chain(self):
            self.event_order.append("on_load_yield_chain")
            yield State.event_arg(4)
            yield State.event_arg(5)
            yield State.event_arg(6)