onDestruct of ui.scrollview, Events Webix Docs

occurs when component destroyed

void onDestruct();

$$("mygrid").attachEvent("onDestruct", function(){
    this.some = null;
    webix.message("This is the end.");
});

Details

Can be used to free memory or delete the related objects

If you have not checked yet, be sure to visit site of our main product Webix html5 library and page of javascript window scroll product.