Same origin policy

Earlier, I said a couple of times that shared workers will be available only to those parent files which share the same origin. What does that mean?

Let us consider the URL http://www.packtpub.com/all.

Here's a table demonstrating which URLs will be of the same origin with this domain, and which won't be:

New URL	SameOrigin	Reason
http://www.packtpub.com/support	Yes	-
http://www.packtpub.com/account/abc/xyz	Yes	-
https://www.packtpub.com/all	No	Different protocol
http://username:[e-mail]/all	Yes	-
http://www.packtpub.com:8000/somepage	No	Different port number
http://packtpub.com/somepage	No	Different host
http://dev.packtpub.com/somepage	No	Different host

 

By now, I believe that you will be able to guess what makes something the same origin and what does not. Yes, you're right! The same host, port, and protocol make two URLs under the same origin. For listed URLs which have their answers as yes, only those URLs will be able to access the shared worker spun by http://www.packtpub...