How to restrict only to draw a specific task dependency type in Gantt

In Gantt, by using “ActionComplete” client-side event with requestType argument as “validatePredecessor” and by disabling the “predecessorValidation” argument we can able to restrict drawing the dependency line to a specific type.

The below code snippet explains restricting the dependency line draw action for creating only the FS (Finish-to-Start) dependency type.                                                                                                                                                                                   

Sample link:

Please refer the Sample link for more information about this.