TODO List Values Not Cleared, Stopwatch Not Displayed

Thank you for your help.Thank you for your cooperation.

I'm thinking of making a daily exercise record with Monaca.
http://docs.monaca.mobi/cur/ja/sampleapp/samples/todo/

Created new and loaded TODO list

I just connected it to my phone and it worked.
Data is not cleared after adding
The previous value has been retained.

Does this mean that the original data provided is strange?

Also, use Notepad and Stopwatch
I'd like to record the time I went there.
http://www.red.oit-net.jp/tatsuya/java/stopw.htm

With the above in mind, it did not work when I incorporated it into HTML.

Are there any good study sites?

What I'm trying to make is

Two images of A and B and two buttons on the top page
Once you click the button, go to each HTML (A, B)
A and B each have an image of A and a stopwatch, and an image of B and a stopwatch.
(Countdown format)
When you're done, save your results to the list

You can create the top page.
Once you click the button, you can also go to each HTML (should be)
The stopwatch doesn't display well.