Functional programming gives developers better ideas on how the application will react, more expected outputs, and less time needed for debugging. Immutability is one of the key points for functional programming, I'll show you some of the things we can improve on the front-end to make the code more immutable and functional.

Julia Gao
Front-end developer from Utah, using ReactJS and ImmutableJS . Loves functional programming, currently learning Racket and Haskell .