diff --git a/js/h5p.js b/js/h5p.js
index a57fe64..63c29a8 100644
--- a/js/h5p.js
+++ b/js/h5p.js
@@ -72,6 +72,38 @@ H5P.DISABLE_ABOUT = 16;
  */
 H5P.opened = {};
 
+/**
+ * H5P Base class. Adds utility functions to a library's prototype object.
+ *
+ * Functions here may be overridable by the libraries. In special cases,
+ * it is also possible to override H5P.Base on a global level.
+ * */
+H5P.Base = function (constructor, standalone, library) {
+  /**
+   * Is library standalone or not? Not beeing standalone, means it is
+   * included in another library
+   *
+   * @method isStandalone
+   * @return {Boolean}
+   */
+  this.isStandalone = function () {
+    return standalone;
+  };
+
+  /**
+   * Returns the file path of a file in the current library
+   * @method getLibraryFilePath
+   * @param  {string} filePath The path to the file relative to the library folder
+   * @return {string} The full path to the file
+   */
+  this.getLibraryFilePath = function (filePath) {
+    return H5P.getLibraryPath(library.library) + '/' + filePath;
+  };
+
+  // This order makes it possible for an H5P library to override H5P.Base functions!
+  return H5P.jQuery.extend({}, this, constructor.prototype);
+};
+
 /**
  * Initialize H5P content.
  * Scans for ".h5p-content" in the document and initializes H5P instances where found.
@@ -135,7 +167,7 @@ H5P.init = function (target) {
     });
 
     // Create new instance.
-    var instance = H5P.newRunnable(library, contentId, $container, true);
+    var instance = H5P.newRunnable(library, contentId, $container, true, {standalone: true});
 
     // Check if we should add and display a fullscreen button for this H5P.
     if (contentData.fullScreen == 1 && H5P.canHasFullScreen) {
@@ -724,6 +756,10 @@ H5P.newRunnable = function (library, contentId, $attachTo, skipResize, extras) {
     extras.previousState = library.userDatas.state;
   }
 
+  // Makes all H5P libraries extend H5P.Base:
+  var standalone = extras.standalone || false;
+  constructor.prototype = H5P.Base(constructor, standalone, library);
+
   var instance;
   // Some old library versions have their own custom third parameter.
   // Make sure we don't send them the extras.
@@ -759,6 +795,7 @@ H5P.newRunnable = function (library, contentId, $attachTo, skipResize, extras) {
   }
 
   if ($attachTo !== undefined) {
+    $attachTo.toggleClass('h5p-standalone', standalone);
     instance.attach($attachTo);
     H5P.trigger(instance, 'domChanged', {
       '$target': $attachTo,