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class.js
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21 lines (21 loc) · 853 Bytes
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//可以看生成的js就知道了 name，width height是constructor私有的变量 area 和color 是私有属性
var Shape = (function () {
function Shape(name, width, height) {
this.name = name;
this.area = width * height;
this.color = "pink";
}
;
Shape.prototype.shoutout = function () {
return "I'm " + this.color + " " + this.name + " with an area of " + this.area + " cm squared.";
};
return Shape;
}());
//构造器中参数(name, width 和 height) 的作用域是局部变量
var square = new Shape("square", 30, 30);
console.log(square.shoutout());
console.log('Area of Shape: ' + square.area);
console.log('Name of Shape: ' + square.name);
console.log('Color of Shape: ' + square.color);
console.log('Width of Shape: ' + square.width);
console.log('Height of Shape: ' + square.height);