We are hoping to soon migrate to Salesforce Lightning Experience (LEX). We have migrated many of our users but before migrating the remaining large teams I have a problem to solve.
I know the URL Hack was unsupported and has been replaced with "Publisher Actions" but unfortunately I can't see how we can prepopulate fields based on the record detail (and I've struggled with lookups). My tests simply allow me to store field default values regardless which will leave the users completing more work in LEX than in Classic and that simply means we won't yet migrate these users (really want to avoid this).
Can anyone advise the best solution to the above in LEX? Components?
EDIT- A key piece of data to prepopulate on the new record is taken from the visualforce page, it isn't available on the record detail.