Specification: https://html.spec.whatwg.org/
Multipage: https://html.spec.whatwg.org/multipage/#title-on-style
Complete: https://html.spec.whatwg.org/#title-on-style
Referrer: 

Comment:
Under the https://html.spec.whatwg.org/#title-on-style:  "...the user agent
must queue a task to invoke the update a style block algorithm"  for the case
when one of the child nodes of the STYLE element is modified by a script, and
this script then attempts to access modified style data - it will not be
available  to the script because the "update a style block" algorithm has not
been run at this point (it has been queued)  It appears that the browsers
don't queue "update a style block" algorithm, but run it immediately after any
change has been made to the contents of the STYLE element (see
WebKit/Source/WebCore/html/HTMLStyleElement::childrenChanged)  Example: 
<style id="s"></style> <div id="d"></div> <script type="text/javascript">   
var s=document.getElementById("s");    s.textContent="#d
{background-color:rgb(1, 2, 3);}";    var d=document.getElementById("d");   
var c=getComputedStyle(d).backgroundColor;    // in IE, XulRunner, WebKit at
this point "c" will be equal to "rgb(1, 2, 3)", which makes sense.    //
however, if implemented according to the spec, "c" will be "transparent" - the
default value,	   // because the changes to the contents of the style element
will be applied only	 // after the current script has completed </script> 
Solution:  change the phrase to: "...the user agent must run a task to invoke
the update a style block algorithm" 

Posted from: 94.75.209.155
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