Code that adheres to DIP

adheres-to-dip.js

class Shape {
  constructor () {}
  setColor (color) {
    this.color = color
  }
}

class Triangle extends Shape {
  constructor (base, height) {
      this.base = base
      this.height = height
    }
  }
}

class Square extends Shape {
  constructor (length) {
    this.length = length
  }
}

class Picture {
  constructor (shape, color) {
    this.shape = shape
    this.shape.setColor(color)
  }
}

const triangle = new Triangle(5, 10)
const square = new Square(5)
const trianglePicture = new Picture(triangle, 'blue')
const squarePicture = new Picture(square, 'blue')