使用ES6新特性开发微信小程序（3）——类

class Shape {
    constructor(name) {       
        this.name = name;
    }
    move(x, y) {       
        console.log(this.name + " Move to: " + x + "," + y);
    }
}

let shapA = new Shape("Shape A", 180, 240); // 输出: Shape A Move to: 180,200
shapA.move(240, 320); // 输出: Shape A Move to: 240,320

class Rectangle extends Shape {
    constructor(name) {
        super(name);
    }
    area(width, height) {        
        console.log(this.name + " Area:" + width * height);
    }
}    
class Circle extends Shape {
    constructor(name) {
        super(name);
    }
    area(radius) {        
        console.log(this.name + " Area:" + 3.14 * radius * radius);
    }
}

let rectangleA = new Rectangle("Rectangle B");    
let circleB = new Circle("Circle C");
rectangleA.move(100, 200); // 输出: Rectangle B Move to: 100,200
rectangleA.area(30, 40); // 输出: Rectangle B Area:1200
circleB.move(200, 300); // 输出: Circle C Move to: 200,300
circleB.area(50); // 输出: Circle C Area:7850

class People {
    constructor(name) {        
        this._name = name;
    }
    get name() {        
        return this._name.toUpperCase();
    }
    set name(name) {        
        this._name = name;
    }
    sayName() {            
        console.log(this._name);
    }
}    
var p = new People("tom");    
console.log(p.name); // TOM
p.name = "john";    
console.log(p.name); // JOHN
p.sayName(); // john

class F3 {
    static classMethod() {        
        return 'hello';
    }
}
F3.classMethod() // 输出: hellovar f3 = new F3();    
// f3.classMethod(); 
// 输出: TypeError: f3.classMethod is not a function

class F4 {}
F4.prop = 5;    
console.log(F4.prop) // 输出: 5