Show desktop notification on rerun if tab is inactive.

Problem

1. User calls streamlit run foo.py
2. A browser tab shows up with the foo.py app in it
3. User ctrl-c’s out of the server, but leaves the tab open.
4. User changes tab, works on something else for hours.
5. User wants to go back to working on foo.py. So she calls streamlit run foo.py

…and then nothing happens. No new browser tab opens, because the tab from (1) is already connected to the new Streamlit server. And the existing tab doesn’t come to the top. So the user has no idea where the app loaded.

Solution

Show a notification at step (4), saying:

App yourscript.py is ready. Click here to see it.

On click, the browser with the Streamlit tab comes to the front and the tab becomes active.

Config

This behavior should be configurable with:

[browser]
showNotificationIfTabInactive = false

[asaini]

@brendalf: We really appreciate your interest in contributing to Streamlit.

Notifications in Streamlit are part of our longer term roadmap so I see this work fitting as a feature in that project. However, this is not a highly requested feature and the broader Notifications project is further down in the list of our priorities.

I think that this project involves a decent amount of Product and design cycles, and we don’t have the bandwidth to support this work as of today. I’ll close this issue for now and re-open when we decide to work on Notifications. Thanks!

@tvst : FYI, I’ve added this feature and the description to the overall Notifications project.

[vdonato]

Hey @brendalf, I don’t think anyone is currently working on this, but it also seems that we’re not entirely sure whether we want to do this. I can surface this to our product team to see if we can get a decision as to whether or not this is something we’d like to add.