live update

I found some dhtmlx componets support ‘live update’ feature. How about gantt?

Could you clarify what do you mean?
Here is the list of features that the new version will include:
If you want to edit tasks without opening the lightbox (inline editing), it is possible to achieve even in the current version:
You can also check this topic: … c35f9aea03

This is the documentation link about ‘live update’.
I see gantt is not on the list.

Thank you for the clarification.
That is an interesting and useful feature. The current Gantt version doesn’t haven’t it and it might take a lot of time to implement it.
However, we’ll investigate the possibility of the implementation and I’ll tell you if the feature is implemented.