But if I fix the quotes: “onTaskLoading” to 'onTaskLoading' everything starts working: http://snippet.dhtmlx.com/e33f516a8
I also tried to reproduce it in a local sample with the trial version and I don’t get the error with the fixed quotes.
The layers are not draggable by default. You need to add that feature manually (except for the split tasks). Here is an example how it might be implemented: http://snippet.dhtmlx.com/a6f4651b3
I want to reduce or extend the time scale (planned start date and planned end date) for added layer. so, that we can increase or decrease the planned end date and planned start date for respective task. as we do with original bar.