Are there any active projects that do anything similar? The two things I'd quite like to transform are In a es2015 Class function if base identifier foo is a

Are there any active projects that do anything similar? The two things I'd quite like to transform are In a es2015 Class function if base identifier foo is a class field (in this or ancestor class) it becomes this.foo . Only for fields defined in the Class definition. for (x of y) becomes for (let x of y)