An experimental babel-plugin to enforce functional programming within JavaScript at build time.

• give error on this (OOP construct)
• give error on class (OOP construct)
• give error on new (OOP construct)
• give error on super (OOP construct)
• give error var (unclear scoping)
• give error on function expression (unclear scoping)
• give error when assigning value to a variable outside the current function block (function purity)
• function should always have a return as last statement (functional)
• function should only have one return statement

(warning shotgun approach here)

• give error on *.push (mutation)
• give error on *.shift (mutation)
• give error on *.sort (mutation)
• give error on *.splice (mutation)
• give error on *.unshift (mutation)
• give error on *.copyWithin (mutation)
• give error on *.pop (mutation)
• give error on *.reverse (mutation)

Are very welcome!

MIT