On 5 Jun 2007, at 16.07, Andrew Black - lists wrote:
How many times have I gone to a form
...
Why can't it check your username is sensible before all the other
things. I guess with Ajax you can
Indeed, indeed. It's not just checking the username, for that matter.
It's any sort of validation that can go on, and nearly every form
uses some sort or another, not just registration forms. Checking for
allowed characters, checking whether a phone number is properly
formatted, checking whether the enter-your-password-twice fields
match...
I've been writing a form-building library for web apps written in
Python. It has built-in Ajaxy stuff for that kind of validation. For
any input (or multiple), you can supply validators, and it generates
the JavaScript to perform the validation asynchronously and without
requiring any reloads. Validators are normally written in Python and
executed server-side, in which case my library calls it with Ajax,
but they can also provide JavaScript versions of themselves, if it's
something that doesn't require server-side data.
I'm sure there'll still be some things to hate in there, but at least
it's progress!
