CKE 4.x - Problems with IE10 Quirks mode

[Jakub Ś]

1. Open attached sample in IE10 (You need to copy it to samples folder)
2. Switch to source and back

Results:

• Notice that buttons still have greyed out style (like in source mode)
• When you click on toolbar button -dialog shows up but JS error is also thrown.
  

Message: Unable to get property '0' of undefined
Line: 1108
URI: /ckeditor4/plugins/dialog/plugin.js

[Piotrek Koszuliński]

Situation looks bad. It turns out that IE10 has two Quirks Mode - the new one, which is close to standards and which in fact replaced the old one, because IE10 turns it on when there's no Doctype. And old QM (IE5 mode) which needs meta tag to be turned on.

More info:

• ​http://stackoverflow.com/questions/11865188/does-the-windows-8-internet-explorer-10-still-have-quirksmode
• ​http://blogs.msdn.com/b/ie/archive/2011/12/14/interoperable-html5-quirks-mode-in-ie10.aspx

Thanks to this brilliant decision editor tries to work in IE5 mode on browser that is in neither IE5 nor standards mode. I haven't checked that, but I guess that we'd need to handle completely new bugs set and we're definitely not going to try to do this now.

[Piotrek Koszuliński]

Quick test proved that I wasn't right that situation looks so bad :). New IE10's QM is pretty close to std mode, so we just need to modify env.js, so editor's QM isn't turned on on IE10's QM.

[Frederico Caldeira Knabben]

#10450 is to be reviewed when closing this one.

[Piotr Jasiun]

Fixed. env.ie6Compat is now false for quirks mode in IE10 and everything seems to be fine.

​git:8fdd7f3

[Piotrek Koszuliński]

env.ie6Compat = version < 7 || (env.quirks && version != 10);

IE11 will not have QM? I guess it will.

[Piotr Jasiun]

I'm not sure if IE11 will still have env.ie == true, but good point. I changed it ​t/9654.

[Olek Nowodziński]

I rebased the branch o master and fixed code-style. The UI still doesn't look perfect but the editor is working with this fix.

[Piotr Jasiun]

Merged into master ​git:0fb7afe