[whatwg] defer on style, depends
bzbarsky at MIT.EDU
Sun Feb 15 09:54:38 PST 2009
Garrett Smith wrote:
>> Because you have <script>s after your stylesheets, not just stylesheets.
>> Really, controlled experiments are hard. You have to hold all but one
>> variable constant.
> OK, I modified the example:
> The bottom script will not load ('load' as opposed to 'run') in
> Firefox/3.0.6 until after 5 seconds.
Right. Because you still have another script before it.
> The result shows that example.js loads 5 seconds after the initial
> page load. example.js waits for the stylesheet to load.
It waits for the first script to execute, which waits for the stylesheet
to load. That's not quite the same thing.
> My concern is with the recomputation you mentioned. Can you elaborate
> on that, or point me to a webpage that explains it?
Well, once a new stylesheet loads you have to redo rule matching for all
nodes that might be affected in the document. In practice, I believe
current UAs will rerun the rule matching algorithm on all nodes in the
> Question: What does IE do?
That's a really good question. I don't have IE on hand to test with; do
>> Well, one option is to stop worrying about micromanaging the load order and
>> assume that speculative parsing will solve your problems.... will it?
> Possibly. If the author could declare what a script depends on and let
> the implementation determine what to load and when, would that be too
Too complicated for whom? The author or the implementation?
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