typescript
1// Implementor interface
2interface Renderer {
3  renderShape(shape: string): void;
4  renderColor(color: string): void;
5}
6
7// Concrete Implementors
8class ScreenRenderer implements Renderer {
9  renderShape(shape: string): void {
10    console.log(`Drawing ${shape} on screen`);
11  }
12  renderColor(color: string): void {
13    console.log(`Applying ${color} on screen`);
14  }
15}
16
17class PrintRenderer implements Renderer {
18  renderShape(shape: string): void {
19    console.log(`Printing ${shape}`);
20  }
21  renderColor(color: string): void {
22    console.log(`Printing in ${color}`);
23  }
24}
25
26// Abstraction
27abstract class Shape {
28  constructor(protected renderer: Renderer) {}
29  abstract draw(): void;
30}
31
32// Refined Abstractions
33class Circle extends Shape {
34  draw(): void {
35    this.renderer.renderShape('circle');
36    this.renderer.renderColor('blue');
37  }
38}
39
40class Square extends Shape {
41  draw(): void {
42    this.renderer.renderShape('square');
43    this.renderer.renderColor('red');
44  }
45}