From form submit refresh?

Form form submission Jump

Reasons for writing:

The HTML level of the landlord general, accidentally remembered around people often said form form submission will refresh the page, free to do nothing, think of the reasons

Want to think about why the refresh, guess the following several

1. Submit data before the browser performs a F5-like operation after the server receives the data

2. Simultaneously perform data transfer, and F5

3. Related to the design of the server

4. Related to browser implementation

5. The agreement requires the page to be refreshed

Think that these are unreasonable, think and think again ....

Later think of the previous done registration page, the data submitted to the server, after the background redirect to other pages, is not a page refresh, so-called page refresh may be the data submitted to the current redirect to the present registration page, it seems to be refreshed, is actually a normal redirect

From form submit refresh?