On Tue, Apr 28, 2009 at 1:45 PM, Franco Saliola <sali...@gmail.com> wrote: > On Mon, Apr 27, 2009 at 9:07 PM, William Stein <wst...@gmail.com> wrote: >> >> On Mon, Apr 27, 2009 at 11:45 AM, Jason Grout >> <jason-s...@creativetrax.com> wrote: >>> >>> William Stein wrote: >>>> On Mon, Apr 27, 2009 at 11:29 AM, kcrisman <kcris...@gmail.com> wrote: >>>>> Just as a postscript, I was really glad to have the autosave a few >>>>> minute ago, where I nearly deleted an entire lecture's worth of notes >>>>> and computations which I hadn't saved, by accidentally brushing >>>>> against a browser shortcut to a "favorites" page on the wrong window. >>>>> (This could happen with "reload" or other shortcuts, too, I suspect.) >>>>> When I used the browser "back" button, I had literally nothing, but >>>>> the autosave had captured my previous revision! >>>> >>>> You could have just pressed reload and you would have had your >>>> worksheet back entirely. It was still sitting there on the server in >>>> RAM. Never use the back button with the sage notebook, unless you >>>> immediately press refresh. >>>> >>> >>> Tom or some other javascript ninja: >>> >>> Isn't there some sort of javascript that disables the back button? >>> That's a common problem in web applications, and I'd be very surprised >>> if it isn't a solved problem already. >>> >>> Jason >>> >> >> Not, there is no javascript to do that. Also, disabling the back >> button is irrelevant to the above problem, which would only have been >> prevented by disabling being able to leave the page by clicking on a >> favorites. There is javascript to attempt to prevent users from >> leaving pages -- lots of spam sites use it. Of course it doesn't work >> well though, and is often extremely annoying. > > I am using GMail. I hit reply. I typed this. Now I am going to hit the > browser's back button... > > I'm still here. So Google can do it.
They did not disable the back button. They are calling a javascript function on leaving the page, which could be via the back button, clicking a link, etc. The Sage notebook could also popup a dialog when you try to leave a worksheet page. > It presented me with a warning: > > Your draft has been modified. > > Abandon changes? > > See the attached screenshot. > > Franco > > -- > > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
