DowloadButton callback not triggering

[joel-odlund]

Describe the bug

The DownloadButton is not triggering the callback for the click event.
When clicking on the button, the code in the callback is not run.
In the example, expect the label to change when pressed. It does not, and
debugging the code indicates that the callback is not run.

I am not sure if this is intended or a bug. The examples indicate that this is the correct usage.

Have you searched existing issues? 🔎

• I have searched and found no existing issues

Reproduction

import gradio as gr

def callback():
    return  gr.DownloadButton(
        label="Download pressed",
        value="file.csv")

with gr.Blocks() as app:
    dl = gr.DownloadButton(label="Download",value = None )
    dl.click(callback, inputs = None, outputs=dl)

app.launch()

Screenshot

No response

Logs

No response

System Info

Gradio Environment Information:
------------------------------
Operating System: Darwin
gradio version: 4.20.0
gradio_client version: 0.11.0

------------------------------------------------
gradio dependencies in your environment:

aiofiles: 23.2.1
altair: 5.2.0
fastapi: 0.110.0
ffmpy: 0.3.2
gradio-client==0.11.0 is not installed.
httpx: 0.27.0
huggingface-hub: 0.22.1
importlib-resources: 6.4.0
jinja2: 3.1.3
markupsafe: 2.1.5
matplotlib: 3.8.3
numpy: 1.26.4
orjson: 3.9.15
packaging: 24.0
pandas: 2.2.1
pillow: 10.2.0
pydantic: 2.6.4
pydub: 0.25.1
python-multipart: 0.0.9
pyyaml: 6.0.1
ruff: 0.3.4
semantic-version: 2.10.0
tomlkit==0.12.0 is not installed.
typer: 0.11.0
typing-extensions: 4.10.0
uvicorn: 0.29.0
authlib; extra == 'oauth' is not installed.
itsdangerous; extra == 'oauth' is not installed.

Severity

Blocking usage of gradio

[joel-odlund]

👍