[whatwg] Link.onload; defer on style, depends

[Sean Hogan]

Ian Hickson wrote:
> On Sun, 15 Mar 2009, Boris Zbarsky wrote:
>   
>> Sean Hogan wrote:
>>     
>>>> This is a request for the link element to be given an onload 
>>>> attribute.
>>>>         
>>> And presumably a readyState property.
>>>       
>> At least in Gecko, you can already detect whether the sheet is done 
>> loading: if you try to get its cssRules and that throws 
>> INVALID_ACCESS_ERR, then it's still loading.  (If it throws 
>> DOM_SECURITY_ERR then you're not allowed to read the style data; that's 
>> why you have to check for the exact type of exception thrown.  Though 
>> really, if you're loading style sheets cross-site you're in for a world 
>> of hurt unless you control both sites.)
>>     
>
> I haven't added readyState at this time. I am concerned about feature 
> creep here.
>
>   

As for link.onload, link.readyState is implemented in IE since IE6. Same 
values as document.readyState, etc.