Why this js script doesn't work?

Question

I just created a stopwatch using html/css and javascript. I also write down the js script for stopwatch well, As i asume there is no problem in it. But it does'nt work.
can you sort out why?
Thank you

https://code.sololearn.com/WNfs4868OHb7

Answer 1

Thank you
we both resolved the problem.