How can i get all the data of type milestone?

Gantt
#1

Hi，
Is there an API to get data based on type?
I want to get all the data of type milestone,then change their constraint type to must start at or must end at.

#2

Hello Zhang,
You can use the getTaskBy method to obtain all tasks based on the specific property:
https://docs.dhtmlx.com/gantt/api__gantt_gettaskby.html

Here is an example:

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