Hello Christophe,
Took a detour into Advanced Rails Recipes and Deploying Rails Applications and am back into your book. The auto-completion chapter has excellent examples as usual.
On page 333 of the book, you describe various callbacks and go on to say that the afterUpdateElement is the most-often used callback. Can you please give an example of that? Preferably as short snippet of code since that is what I like about your book in the first place, i.e., plenty of non-trivial code examples.
Thanks and regards,
Bharat