According to the Codex, wp_enqueue_script supports protocol relative, or protocol agnostic external links: "Remote assets can be specified with a protocol-agnostic URL, i.e. '//otherdomain.com/js/theirscript.js'."

But I'm not seeing it:

wp_enqueue_script('google-maps', '//maps.googleapis.com/maps/api/js?&sensor=false', array(), '3', true);


<script type='text/javascript' src='http://localhost:25898//maps.googleapis.com/maps/api/js?sensor=false&#038;ver=3'></script>

Notice that the protocol relative URL is appended to the site URL.


The code you posted works fine and results in this in the HTML output:

<script type='text/javascript' src='//maps.googleapis.com/maps/api/js?sensor=false&#038;ver=3'></script>

Tested on WordPress 3.5 with this code snippet:

add_action('wp_enqueue_scripts', 'test');
function test() {
  wp_enqueue_script('google-maps', '//maps.googleapis.com/maps/api/js?&sensor=false', array(), '3', true);
  • Do you know it this is new in WordPress 3.5? – Michiel van Oosterhout Jan 25 '13 at 13:12
  • Protocol-relative URLs was added 7 months ago: core.trac.wordpress.org/ticket/16560 – Otto Jan 25 '13 at 16:25
  • Ok, so it's not the version of WordPress that I'm using. So what could cause the difference in behaviour? – Michiel van Oosterhout Jan 28 '13 at 9:59
  • 1
    Well, that code was added 7 months ago, but if you look at the ticket, it has a 3.5 milestone, so yes it's probably new behavior to 3.5. – Otto Jan 28 '13 at 22:13
  • Oh right, I was looking at the 'Version' field which was set to 3.1, but that's the version of WordPress at the time the ticket was created. – Michiel van Oosterhout Jan 29 '13 at 12:09

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