How to stop a skript like trinket.io does

[Björn T]

First of all: Thank you for your great job.

I have made a skulpt project for my students. When somebody made an infinite loop, the browser crashes and the code is gone. That is very frustrating for that student. I want to add a stop button like this one on trinket.io (https://trinket.io/python). I tried to understand their code, but got stucked.

I followed the instructions on skulpt.org to getting started with skulpt.

Any ideas?

By the way: The example on the site http://www.skulpt.org/static/developer.html about adding a module got a little bug. The line

return myfact(a);

should be

return myfact(a.v);

[Björn T]

i = 0
while True:
    print(i)
    i = i + 1

This is an example, that crashs the browser. I think I have to use suspensions but didn't get the point where to start.

The scipt starts printing after i stoped the browser, but it should printing all the time.