page.py 文件源码

def waitFor(self, selectorOrFunctionOrTimeout: Union[str, int, float],
                options: dict = None, **kwargs: Any) -> Awaitable:
        """Wait for function, timeout, or element which matches on page."""
        frame = self.mainFrame
        if not frame:
            raise PageError('no main frame.')
        return frame.waitFor(selectorOrFunctionOrTimeout, options, **kwargs)