asynchronous javascript loading/executing
- by Kai
In this post, asynchronous .js file loading syntax, someone said, "If the async attribute is present, then the script will be executed asynchronously, as soon as it is available."
(function() {
var d=document,
h=d.getElementsByTagName('head')[0],
s=d.createElement('script');
s.type='text/javascript';
s.async=true;
s.src='/js/myfile.js';
h.appendChild(s);
}()); /* note ending parenthesis and curly brace */
My question is, what does "the script will be executed asynchronously" mean? Will this script be executed in a different thread from other javascripts in the page? If yes, should we worry about synchronization issue in the two threads?
Thanks.
