WordPress 3.5 + Foundation 5 not working on IE9

  1. You are using an approximately 2 year old version of WordPress
  2. With what looks to be an up-to-date framework
  3. that depends heavily on Javascript

WordPress 3.5 shipped with jQuery 1.8.3. This thread suggests that Foundation 5 is actually built for jQuery 2, but will will work with jQuery 1.10.2 (though one person still reports issues).

I am guess that you have a Javascript problem. IE9 is choking on some particular quirk of the jQuery or Foundation 5’s scripts, or Foundation 5 is trying to use something not supported in the jQuery or scripts bundled two years ago with WordPress 3.5.

It sounds like you are trying to make old technology work with new, and that is going to be an uphill fight. You can certainly remove and replace the bundled scripts– the script loader system makes that easy– but I don’t know if you can do that and not break other things. You could invert your problem– get Foundation working but break Core scripts or other plugins. Remember that WordPress is written for its bundled Javascript. Change that and you are asking for trouble. The same with Foundation 5. If you can get this working at all, it probably means painstakingly hacking the script files. I have no idea how to be more specific than that.

Maybe that will help you move in the right direction.

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