simple confirmation on button/link

[Garret Wilson]

All,

I've created a simple confirmation link based on Sven Meier's 
ConfirmationLink code <https://cwiki.apache.org/confluence/x/X4U> on 
Confluence. For the most part it works, but...

...but if I'm on an upload form, then an an Ajax link won't work because 
I need to actually submit the multipart information.

The theory behind Sven's code should work the same with or without an 
Ajax link. Wicket's AjaxLink simply provides an easy way to inject the 
confirmation JavaScript without having to wire the event handling 
manually. You'll see on the same page listed above other examples that 
do this wiring manually, and do it in a way that is decidedly "not 
correct" (replacing the onclick attribute) according to today's modern 
JavaScript best practices (and frankly hasn't been correct for almost a 
decade).

There is some discussion of this sort on that page, with a bit of 
back-and-forth about wanting a general, reusable solution, but in the 
end only giving an example of "something in that fashion" and with 
another contributor noting that their solution "isn't working and I need 
to figure out why". And now we're at Wicket 7 and even the incomplete 
examples on this page don't work anymore because the underlying classes 
have been removed.

(On that page the idea of Ed Eustace is also mentioned, namely to use 
Component.replaceWith() to have an embedded confirmation panel that 
appears when needed. But it's as usually a completely do-it-yourself 
project.)

So, friends, does the latest version of Wicket have an easy way to make 
a confirmation dialog? If not, does it have an easy way for me to inject 
JavaScript using best-practice DOM event binding?

Garret