I need to populate certain columns of the list when I select a value from the dropdown column in the same list. Say for example I select create Item in the list and then I have a column called FlightNumber, when I select a particular flight number, I need to use Java webservice to call and populate certain fields in the list based on the FlightNumber I selected. I did try searching but was unable to figure out, please help me on this.
below are few code samples available using JSLink
Option 2 :SPFx extension field Customizer
With JSLink i have done a similar code where we need to query User profile service when user enter the username and populate other data in columns. so it was achievable.