Firefox not able to enumerate document.styleSheets[].cssRules[]

Question

Here is the code:

• http://jsfiddle.net/salman/2hyYg/
• http://jsfiddle.net/salman/2hyYg/show/

You\'ll notice the alert(document.styl

Answer 1

You can get that error when trying to read a stylesheet loaded from a different domain or server, or trying to read an @import rule.

For your purpose, just check the document.styleSheets.length .