Project: esmodule
Task (easy): Class Shape (file 'modules/Shape.js') contains an getter 'area' returning the area (number, default 0) of the shape. Class Rectangle (file 'modules/Rectangle.js') inheriting from Shape contains properties 'width' (number), 'height' (number) initialized in constructor. Call `log('shape1', new Shape().area); log('rectangle1', new Rectangle(2, 3).area)` in 'index.js'.