The "initialization" steps for Web browsers

Ian Hickson ian at hixie.ch
Tue Jun 10 14:33:52 PDT 2014


On Tue, 10 Jun 2014, Domenic Denicola wrote:
>
> Remember that ES tasks === HTML microtasks (in all implementations 
> today [...]

That doesn't sound right. If every script is always running on an ES task, 
then it sounds like an ES task is neither an HTML task nor an HTML 
microtask. A single HTML task might involve running multiple scripts (some 
even nested inside each other, with microtasks firing after each of 
those). For example, consider a task that changes a flag and then fires an 
event; the event being fired is then handled by a number of event 
listeners, each of which then fires an ES task to run the script, and 
after each one there's the microtask queue is flushed, before finally 
returning back to the main task, and then continuing the event loop.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'


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