[TYPO3-dev] Best technique for a BE-form onchange

[Dan Osipov]

Take a look at RFC: #9562: Feature: onChange has no effect, it's related 
- although specific to IRRE.

Dan Osipov
Calkins Media
http://danosipov.com/blog/

Benjamin Mack wrote:
> Hey,
> 
> I like to have an AJAX-able update field, here's what I think:
> 
> * We need to be aware of some constraints when reloading a single field, 
> where we one the one hand have conditions on types (like page types and 
> CTypes in tt_content), and that other fields could rely on that.
> 
> * We sometimes have multiple forms on a single page, we have different 
> things that get initialized when a page loads.
> 
> * We need to make sure that extensions that expand a table can trigger a 
> reload of an existing field of a form. We should be very flexible.
> 
> My goal was that we first finish the move to the object-oriented 
> TCEforms (I think Andreas Wolf could need a lot of help here, still), 
> and then that we then expand the TCA to have something like an extended 
> "onChange" that is used to make a JS call. We do an inclusion of JS 
> similar to the ext_tables.php we do for each table and that way, one 
> could write specific handlers for each fields. We could have some 
> predefined functions to reload only one form, one field, and take the 
> already existing "conditions" syntax of other fields into account.
> 
> What do you think?
> 
> Nevertheless I would really love to go with some teamwork here :) Thanks 
> for sharing your ideas.
> 
> All the best,
> Benni.