Mobile Framework7 how to disable button while SC executing and display spinner / preloader

Hi everybody,

  1. How do you manage to disable button while SC executing on Mobile App using Framework7 (in order to prevent user from clicking several time) ?
  2. How do you display a spinner / preloader / progress bar?
    Many thanks

Should be the same as here:

Thanks @brad - but I tried this solution this morning without success…
Maybe it works only with emulator?
(I actually test and review my App with the Browser view because of errors)