Hi guys,

The Prototype Insertion classes have been marked as deprecated in
version 1.6.0. The part of the updateContent function that deals with
insertion currently looks like this.

if (options.insertion) {
  if (Object.isString(options.insertion)) {
    var insertion = { }; insertion[options.insertion] = responseText;
  else options.insertion(receiver, responseText);

I'm not sure whether the "else" option has been provided solely for
backwards compatibility or whether it was intended to also allow
custom insertion functions. The Prototype API documentation makes no
mention of using it in this way.

Either way, I'd like this option to stay. I've found that it is the
only clean way to reliably perform a scriptaculous effect before the
content is replaced. I've successfully used this technique to do one
effect before and one effect after the content is replaced. Using
effect queues, as suggested in http://dev.rubyonrails.org/ticket/2620,
is not sufficient because even though this separates the effects, it
does not prevent Prototype from replacing the content before the first
effect has completed.

The Rails helpers need to be updated to at least deal with the
deprecation issue so I've filed a ticket about both issues at
http://rails.lighthouseapp.com/projects/8994/tickets/83. DHH hastily
closed it because he thought it was solely a Prototype issue but I'll
get it reopened once I know whether the "else" option I mentioned
above is staying or not.

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