Re: In order to make the url bookmarkable, sometimes we need long parameters but IE max url length is only about 2000, How to deal with it?

Now consider applications (as opposed to pages) with very rich state of undo/redo like a content creation app (i.e. editor).

Then the content creation/edit tool should have undo/redo controls. Because thats where they belong to.

 

It is entirely possible for the user to hit the back button (looking for undo)

Then this user has used the internet the first time ever. No one will treat these browser controls as undo/redo. These controls are always in the navigation area of a browser: back, forward, reload, enter url.

 

and the result will be that he loses all his work so far.

If the user accidentally hits browser back button and you don't want to loose the work then you should implement autosave. 

There is literally no good reason to redefine the meaning of browser controls.

But this is getting off-topic :)

-- J.

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