I saw the //somepage.com/resource
url format. For example:
<img src="//remotesite.com/image1.jpg" />
The point of this is that if the current page (the page defining the img
tag) is using http
, then the request to the remote site is made via http. If it is https - it's https. This eliminates browser warnings of not fully encrypted pages.
My question is - is this URL format safe to use for all browsers. And is it a standard?
is this URL format safe to use for all browsers.
I can't say anything for sure, but you should be able to test it in different browsers.
And is it a standard?
Technically, it is called "network path reference" according to RFC 3986. Here is the scheme for it:
relative-ref = relative-part [ "?" query ] [ "#" fragment ]
relative-part = "//" authority path-abempty
/ path-absolute
/ path-noscheme
/ path-empty
There is a problem though, when used on a <link>
or @import
, IE7 and IE8 download the file.
Here is a post written by Paul Irish on the subject: