Method predicate

playwright/_impl/_frame.py:246–255

(event: Any)

        waiter.log(f"waiting for navigation{to_url} until '{waitUntil}'")

        def predicate(event: Any) -> bool:
            # Any failed navigation results in a rejection.
            if event.get("error"):
                return True
            waiter.log(f'  navigated to "{event["url"]}"')
            return url_matches(
                cast("Page", self._page)._browser_context._base_url,
                event["url"],
                url,
            )

        waiter.wait_for_event(
            self._event_emitter,