How to prevent auto calculation of start date, end date and duration

Gantt
#1

Hi,

I am passing the start date, end date, and duration. I just wanted to prevent the auto calculation of Gantt.

#2

Hello Abid,
When you load the task data into Gantt, it needs to modify it to the format it works with. If there are only 2 date parameters, for example, only the start_date and duration, Gantt needs to calculate the end_date. If there are all three date parameters, the duration parameter will be ignored and calculated from the start_date and end_date parameters.
There is no way to change how it works.
However, you can change what is displayed for the users. You can set the gantt.config.duration_unit to minute and add the formatters that will convert the minute units to days or months:
https://docs.dhtmlx.com/gantt/desktop__formatters_ext.html
https://docs.dhtmlx.com/gantt/desktop__working_time.html#taskdurationindecimalformat
Here is an example of how it works:
https://docs.dhtmlx.com/gantt/samples/09_worktime/09_decimal_durations.html