Accepted filetypes parameter in FileDropper component does not support file extensions

[jurriaanpro]

ALL software version info

Software Version Info

panel v1.5.2
python 3.11.8

FilePond 4.31.4 is retrieved when loading component (not sure if relevant)

Description of expected behavior and the observed behavior

Panel docs state that it should be possible to specify file extension in the accepted_filetypes parameter of the FileDropper component. However, when specifying .txt and dropping a file example.txt, the error as seen in the screenshot below shows.

The underlying FilePond library seems to be only supporting mime types. See https://pqina.nl/filepond/docs/api/plugins/file-validate-type/#properties

I guess that either Panel docs is invalid or that code needs to be updated to transform specified extensions into MIME types.

Complete, minimal, self-contained example code that reproduces the issue

import panel as pn

file_dropper = pn.widgets.FileDropper(accepted_filetypes=[".txt"])

file_dropper

Screenshots or screencasts of the bug in action

• I may be interested in making a pull request to address this in case its a documentation issue.

[ahuang11]

Thanks for reporting this! I believe this is a duplicate of #7153

[jurriaanpro]

Closed as duplicate of #7153