js-patterns/builder.js at main · Kowenjko/js-patterns · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
// Builder

class Car {
	constructor() {
		this.autoPilot = false
		this.parktronic = false
		this.signaling = false
	}
}

class CarBuilder {
	constructor() {
		this.car = new Car()
	}

	addAutoPilot(autoPilot) {
		this.car.autoPilot = autoPilot
		return this
	}

	addParktronic(parktronic) {
		this.car.parktronic = parktronic
		return this
	}

	addSignaling(signaling) {
		this.car.signaling = signaling
		return this
	}

	updateEngine(engine) {
		this.car.engine = engine
		return this
	}

	build() {
		return this.car
	}
}

const myCar = new CarBuilder()
	.addAutoPilot(true)
	.addParktronic(true)
	.updateEngine('V8')
	.build()

console.log(myCar)

// {
//     "autoPilot": true,
//     "parktronic": true,
//     "signaling": false,
//     "engine": "V8"
// }