Onscroll / Onpreviewscroll event handle
Plaese press F12, open the develop tools.
#### Settings ```javascript { onscroll : function(event) { // console.clear(); // console.log("onscroll =>", this, this.id, this.settings, event); // ... }, onpreviewscroll : function(event) { // console.clear(); // console.log("onpreviewscroll =>", this, this.id, this.settings, event); // ... } } ```