[NEW] #5 Ignore default prevented clicks

lib/proto/attach-link.js

@@ -53,14 +53,26 @@ var linkAction = function(el, event) {
   this.loadUrl(el.href, clone(this.options))
 }
 
+var isDefaultPrevented = function(event) {
+  return event.defaultPrevented || event.returnValue === false;
+}
+
 module.exports = function(el) {
   var that = this
 
   on(el, "click", function(event) {
+    if (isDefaultPrevented(event)) {
+      return
+    }
+
     linkAction.call(that, el, event)
   })
 
   on(el, "keyup", function(event) {
+    if (isDefaultPrevented(event)) {
+      return
+    }
+
     // Don’t break browser special behavior on links (like page in new window)
     if (event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) {
       el.setAttribute(attrKey, "modifier")