Popup close buttons can take a URL.

lib/card/card.js

@@ -269,7 +269,7 @@ export default class Card {
         */
         return html.replace(
             /<\s*(a|video|img|image|circle)\s(.*?)(xlink:href|href|src)\s*=\s*["'](\..*?)["']\s*(.*?)>/g,
-            function () {
+            function() {
                 let path = that._getRelativePath(arguments[4])
                 const tag = `<${arguments[1]} ${arguments[2]} ${arguments[3]}="${path}" ${arguments[5]}>`
                 /* if (that.debug) */ console.log('Adjusted: ', tag)
@@ -298,7 +298,7 @@ export default class Card {
         return new Promise((resolve, reject) => {
             let request = new XMLHttpRequest()
 
-            request.onreadystatechange = function () {
+            request.onreadystatechange = function() {
                 if (this.readyState == 4) {
                     if (this.status == 200 || Card._isLocal()) {
                         try {
@@ -1593,7 +1593,7 @@ export default class Card {
                 })
             },
             onUpdateParams: ['{self}'],
-            onUpdate: function (self) {
+            onUpdate: function(self) {
                 let transform = self.target._gsTransform
 
                 TweenLite.set(title, {