Function _send_batched

dash/backends/ws.py:302–323

Send messages as a batch. Single messages are sent as-is. Multiple messages are wrapped in a JSON array without re-parsing - just string concatenation. Args: send_text: Async function to send text data over WebSocket messages: List of pre-serialized JSON message strings

(send_text: Callable[[str], Any], messages: list)

async def _send_batched(send_text: Callable[[str], Any], messages: list) -> bool:
    """Send messages as a batch.

    Single messages are sent as-is. Multiple messages are wrapped
    in a JSON array without re-parsing - just string concatenation.

    Args:
        send_text: Async function to send text data over WebSocket
        messages: List of pre-serialized JSON message strings

    Returns:
        True if send succeeded, False if connection was closed
    """
    try:
        if len(messages) == 1:
            await send_text(messages[0])
        else:
            # Wrap in array: "[msg1,msg2,msg3]"
            await send_text("[" + ",".join(messages) + "]")
        return True
    except Exception:  # pylint: disable=broad-exception-caught
        return False  # WebSocketDisconnect, RuntimeError, etc.


def make_callback_done_handler(