Question

So I have this form which executes a pretty long data posting using AJAX, now I am a bit paranoid that some smart bloke might open firebug and re-trigger posting process, while previous is still in action. How do I avoid this?

Thanks!

Answer 1

You can:

• Disable submit buttons.
• Prevent Enter key presses.
• Remove action attribute from form tag.
• Redirect to another page upon first submission and expire the page with form on it.

With that said, there’s only so much you can do on the front-end to prevent resubmissions – there’s always a way around. If you are so concerned about this, then server-side validation is also necessary (and usually recommended anyway).