Option for "Leave site?" warning

[Ryan-pelo]

Feature Description

A few times I have been typing a long comment or post and accidently clicked a link or refreshed the page. Then all my work is gone and non-recoverable. I would appreciate having a "Leave Site?" dialogue box if I have unsaved content in a text box.

Screenshots

[wxiaoguang]

Related:

• Some actions (Stop Timer/Assign/Label/Milestone ... ) on issue page will make page reload and lose unsaved content, autosave draft or ajax #17705

[silverwind]

There is already a warning via jquery.are-you-sure, but I'm not sure whether it will catch all changes, I think it only looks at stuff inside <form>.

Also, we really need to eliminate all cases of window.reload in JS. Might require new APIs to be added thought.

[wxiaoguang]

Some details & background:

Before SimpleMDE/EasyMDE, there is a global $.areYourSure confirm (using onbeforeunload) for comment textarea. Everything was just "fine".

However, after introducing SimpleMDE/EasyMDE, $.areYourSure doesn't work well with SimpleMDE/EasyMDE editor, so the situation became what you see now.

[silverwind]

Another reason to add to the list of like 30+ other issues on why we should remove EasyMDE and replace it with a textarea.

[wxiaoguang]

I could also agree to remove the EasyMDE if there is no strong objection from user side.

[silverwind]

Yes I think the majority of users is for it, see #10729.

[wxiaoguang]

Then let's do it?

[silverwind]

Yes, I think the approach in #15394 with the github toolbar is still ideal. If you have the capacity to do it, please go ahead, I'm happy to review.