Dojo's back button with bookmarking only saves the last page when another site is visited

[guest]

Problem using the dojo's back button (the one with bookmarking ​http://archive.dojotoolkit.org/nightly/ajax/tests/undo/test_browser_book...):

If this is the browsing history: XHR 1 XHR 2 XHR 3 XHR 4 Another website is visited like google.com and the back button is clicked, it loads the previous application state correctly -- the XHR 4 shows. But when you click the back button again, nothing will happen -- it should suppose to display XHR 3, then when clicking again the back button XHR 2 will be displayed, then XHR 1.

[James Burke]

Unfortunately, this is not supported. When you leave the page that has dojo.undo.browser on it, the history stack that is stored in JavaScript? is destroyed. When you come back from the other page, the JavaScript?-based history history stack is reinitialized since the page is reloaded.

If you have ideas on how to support this, please feel free to add to the bug, but it seems like a use case that cannot be supported.

[guest]

The dhtml history may bring light to this in the future: ​http://codinginparadise.org/projects/dhtml_history/testDhtmlHistory.html

It saves the stack after leaving the application and going back.

[James Burke]

Using a form to save the state as dhtml history does is not quite compatible with the Dojo implementation. The Dojo implementation allows any Java object to be saved in the history stack, which means functions could be on the object (and actually need to be on the object to accept the back button action.

However, maybe the code could be reworked to only allow storage of json objects and the application registers global back/forward calls. In that case, it might work. I'll reopen the ticket and set it for 0.9. Not sure it will get in for 0.9, but at least keep it on the radar a little more.

[James Burke]

small correction I meant JavaScript? not Java in my last comment.

[Ben Lowery]

That kind of change would be a big break in the API. Unsure we want to support it right now...

[dylan]

dojo.undo isn't a thing in modern dojo, dojo.back is deprecated, and between dojo/hash and dojo/router we think this is covered, so closing as wontfix.