The Message class is designed to send, stream, update or remove messages.

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Parameters

content
str

The content of the message.

author
str

The author of the message, defaults to the chatbot name defined in your config file.

elements
Element[]

Elements to attach to the message.

actions
Action[]

Actions to attach to the message.

disable_feedback
bool

Hide the feedback buttons for this specific message.

language
str

Language of the code if the content is code. See https://react-code-blocks-rajinwonderland.vercel.app/?path=/story/codeblock—supported-languages for a list of supported languages.

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Send a message

Send a new message to the UI.

import chainlit as cl


@cl.on_message
async def main(message: cl.Message):
    await cl.Message(
        content=f"Received: {message.content}",
    ).send()

​
Stream a message

Send a message token by token to the UI.

import chainlit as cl

token_list = ["the", "quick", "brown", "fox"]


@cl.on_chat_start
async def main():
    msg = cl.Message(content="")
    for token in token_list:
        await msg.stream_token(token)

    await msg.send()

​
Update a message

Update a message that already has been sent.

import chainlit as cl


@cl.on_chat_start
async def main():
    msg = cl.Message(content="Hello!")
    await msg.send()

    await cl.sleep(2)

    msg.content = "Hello again!"
    await msg.update()

​
Remove a message

Remove a message from the UI.

import chainlit as cl


@cl.on_chat_start
async def main():
    msg = cl.Message(content="Message 1")
    await msg.send()
    await cl.sleep(2)
    await msg.remove()

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on_messageStep Decorator