Updating YUI for vBulletin 3.8 (YUI 2 currently 2.9.0)
 

In vBulletin 4, the developers recently upgraded the bundled YUI version to 2.9.0 from 2.7.0. Since vB 3.8 is EOL, I found a way to manually update the bundled YUI version. I've tested vB 3.8 with YUI 2.9.0 as much as I could, and did not run into any problems.

Changes since 2.7.0 (mainly "Animation", "Connection", "DragDrop/Drag & Drop", "Yahoo"):

2.9.0: http://yuilibrary.com/projects/yui2/...e/Rollup_2.9.0
2.8.0: http://yuilibrary.com/projects/yui2/...e/Rollup_2.8.0

2.9.0 contains fixes for IE9, among others.

There is not a way to move from 2.x to 3.x yet for YUI given the extensive amount of changes that would be needed in vBulletin... maybe one day. ;)

Anyway, to update, follow these steps:

1. Backup your current YUI folder. It is located at /clientscript/yui/.
2. Download YUI 2's latest version (currently 2.9.0) by going to: http://developer.yahoo.com/yui/2/ - you need to select "Full Developer Kit".
3. Once downloaded, extract to your hard drive.
4. Open the resulting /yui_2.9.0/yui/ folder (or the version you downloaded) and find the build folder.
5. Copy the following files to your forum root. You will need to allow them to overwrite.
   
   Code:

   ---

   /animation/animation-min.js          => /your forum root/clientscript/yui/animation/animation-min.js
/connection/connection-min.js        => /your forum root/clientscript/yui/connection/connection-min.js
/connection/connection-min.js        => /your forum root/clientscript/yui/connection.js
/dragdrop/dragdrop-min.js            => /your forum root/clientscript/yui/dragdrop/dragdrop-min.js
/yahoo-dom-event/yahoo-dom-event.js  => /your forum root/clientscript/yui/yahoo-dom-event/yahoo-dom-event.js
/yahoo-dom-event/yahoo-dom-event.js  => /your forum root/clientscript/yui/yahoo-dom-event.js

   ---

6. Edit /includes/class_core.php and find:
   
   PHP Code:

   ---

   define('YUI_VERSION', '2.7.0'); 


   ---

   replace with:
   
   PHP Code:

   ---

   define('YUI_VERSION', '2.9.0'); 


   ---

   save.

And there you go, you have the latest and greatest YUI 2.x.

Why not just skip step 1 - 5 and use YUI on google?

You could, but I would update both. Mods may not always follow the YUI path option.

I found that 3.8.7 release has updated to YUI 2.9.0 because of when i open class_core.php it's showing up define('YUI_VERSION', '2.9.0'); already.