I want to make a flutter app that, when a button is pressed, it runs a python or a js script that I made and is saved in a .js or a .py file. Essentially, I want to run a .js or a .py file when a button in Flutter is pressed. Is that possible? And if yes, how can it be done? I am making a desktop application that has to work offline.
Yes you can using API, you make API in django or flask backend which run the python script you want after you make a request to your API via clicking the flutter button
Yes, this is possible, but it requires Python and JS interpreters to be installed on the device. A way to ensure this is to ship them together with your app, although this will take a lot of extra space. From your app, you just launch the interpreter as a subprocess, for example python3 your_script.py
If your script is hardcoded and not changed later by the app, you can also turn it into a standalone executable, using a tool such as py2exe. But this is basically the same thing, the interpreter just ends up included in your script.