Rails
Rails 7 added --css app generator
Rails 7 added --css app generator for configuring CSS processors.
Rails 7 replaces Webpacker with importmapped Hotwire as default JavaScript setup
A new Rails skeleton will not have to require the full JavaScript toolchain with Webpack by default as Rails 7 embraces the future of Javascript.Rails 7 adds the possibility to check on :priority for ActiveJob tests
Rails 7 gives us option to set `:priority` in test helper methods `assert_enqueued_with` and `assert_performed_with`.Rails 7 adds choices to Javascript generator option
Rails 7 introduces built-in support for webpacker and esbuild.Rails 7: Instrument ActiveStorage analyzers
Rails 7 adds instrumentation for ActiveStorage analyzers so that the time of analysis can be tracked.
Rails 7 adds database-specific setup and reset tasks for multi DB configurations
For multi DB Rails applications starting with Rails 7, we can now setup and reset a particular database.Rails 7: Add from: option to ActiveSupport::TestCase#assert_no_changes
ActiveSupport::TestCase#assert_no_changes adds additional options.Essential Skills For A Senior Rails Developer
Programming is a skill and, just like any skill, to get better at it one needs to practice, practice and practice!
Rails 7 introduces ActiveModel::API
ActiveModel::API allows adding more functionality to ActiveModel::Model and makes itself a minimum API to interact with Action Pack and Action View.