Datatable "isDirty" Flag

Webix JS
1

When i update a row, the complete row is sent to Server by ajax - not only Keyfield + Dirty Fields.
Is there something like a dirty flag (similar to form isDirty() ) that could be used to prevent this?

2

There is no dirty flag for the datatable and other data collection based components.
You can use onBeforeUpdate event of dataprocessor to filter the data before sending

webix.dp( $$("table") ).attachEvent("onBeforeUpdate", function(id, data){
   //delete from data any unwanted property
});
3

So I would have to store separately original data to compare if something has changed?

4

You can use onBeforeEditStop event handler, where you can have access to both new and old values. It can be used to store info about fields that was really changed.