Automate Post Fungtion set Field Value (Date Picker) used JMWE

[tyas.iglecias]

Hi Guys,

I have fields :

- Start date (Date Picker) 

- End date (Date Picker)

- Additional days Overdue (select list (Single choice)), ex : 3,7,14,21

what I need to set "End date" value from post fungtion, if I set "Start date" and "Additional days Overdue".

for exsample : I set "Start date"= 20/07/2022 and "Additional days Overdue"= 7 than post fungtion automate set "End date" value =27/7/2022

Please help me, what can I do In post fungtion ( I used Addons JMWE)

Regards,

Tyas