Adding customization in separated java script file

Hello @pooja.m

Thank you a lot for your kindly help.
If using custom_quotation_dashboard.py, then it will take the code in the custom_quotation_dashboard.py or it will take the code in the quotation_dashboard.py?

From the other side: there is not inheritance and overwrite feature that can be used in the code to do extending and changing part of the code from another custom file (in custom application) without changing in the original file and without having a problem when doing upgrade. Can you please advise?

Regards
Bilal