[SalesForce] How to get page’s static resource URL string using JavaScript code

Javascript remoting can be used within a static resource.

This method fails in a static resource because of the use of the merge field '{!$RemoteAction.MyJSRemoteController.getContentList}' and not because of the use of javascript remoting.

Using the alternate javascript remoting syntax below will work because it is not dependent on a merge field:

MyJSRemoteController.getContentList(function(result, event) {
    //callback stuff
});

Although less elegant, you can also use the following syntax, which is closer to the documented syntax for JS Remoting.:

<script>
      salesCentral.factory('contentData', ['$q', '$rootScope', function($q, $rootScope) {

        return function() {
            var deferred = $q.defer();

            Visualforce.remoting.Manager.invokeAction(
                'MyJSRemoteController.getContentList',
                function(result, event) {
                    $rootScope.$apply(function() {
                      if (event.status) {
                        deferred.resolve(result);
                      } else {
                        deferred.reject(event);
                      }
                    })
                },
                { buffer: true, escape: true, timeout: 30000 }
            );

            return deferred.promise;
        }

    }]);
</script>

Only Visualforce page (and component) files go through the binding to the controller process; static resource files do not.

If the amount of JavaScript is small then leaving it in the page is the simplest approach. If you have more JavaScript, you can create a JavaScript object in the page that has the controller values assigned, and reference that in the JavaScript that is in the static resource.