Hello,
I take dhtmlxTree in example but the suggestion is for all ui controls : smooth animation for having a confortable and pleasant way of using ui controls. It also does not distract the user and it’s easier for the eyes to follow what change on screen.
Example => http://www.jstree.com/demo all the demos there show how it behaves when we expand or collapse nodes.
Is it something that can be take into account ?
Currently, we have not plans to include in-tree animation in next version.
Could it be after the next one ? 
I like the idea about animation. Think about it!
Yes, as almost any modern library support this behaviour, Dhtmlx became one of the very few that don’t support it.
Hoping release 4 will have it
Maybe this could be considered now
Is smooth animation available now in DHTMLX Gantt on scale change and the project collapsed and expand?
Hello @Hajaj_Khan ,
Currently, the gantt doesn’t support such functionality. I sent a request to our dev team and they will consider it for future updates.
I will post any updates in this thread.
Hello @Hajaj_Khan,
Unfortunately, there is no possibility of adding such a feature in close future, because of some fundamental details of the current gantt implementation.