want to implement the function of a web page countdown to trigger a back-end task, but there is no way of thinking.
have a few questions:
1. web
2. web
3.
A rookie, has not done this function, trouble friends to give some ideas, and solutions,
this one of yours is more boring. No, no, no.
Why can't the backend count down by itself? And I need you to let people know when you get there.
is this a second kill page of yours?
how many seconds are left for the backend to return. On your side, change this number of seconds into a time display format.
then subtract one second. How nice. Anyway, in the end, it is still controlled by the server in time.