js 採用delete實現繼承示例代碼

複製代碼代碼如下:

//採用對象冒充的方式實現js繼承

function A(color) {

this.Acolor = color;

this.AshowColor = function() {

document.writeln("Acolor: " + this.Acolor);

}

}

function B(color, name) {

//將newMethod賦值A，調用A的構造函數

this.newMethod = A;

this.newMethod(color);

//然後刪除對A的引用,這樣以後不能調用他

delete this.newMethod;

this.Bname = name;

this.BshowName = function() {

document.writeln("Bname: " + this.Bname);

}

}

var objA = new A("red");

objA.AshowColor();

document.writeln("----------------");

var objB = new B("black", "demo");

objB.AshowColor();

objB.BshowName();

document.writeln("----------------");