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如何在另一个类(ClassB)中实例化一个类(ClassA),并将ClassA对象用作JavaScript中ClassB的属性?

[英]How to instantiate a class(ClassA) inside another class(ClassB) and use the ClassA object as a property in ClassB in JavaScript?

考虑以下代码:

function Coord(x, y) {
    this.x = x;
    this.y = y;
}

function Ellipse() {
    this.Text = Text;
    this.Cx = Cx;
    this.Cy = Cy;
    this.Rx = Rx;
    this.Ry = Ry;
}

现在在函数Ellipse而不是使用CxCy等。我想为每对实例化函数Coord来实现以下目的:

function Coord(x, y) {
    this.x = x;
    this.y = y;
}

function Ellipse() {
    this.Text = Text;
    Coord C = new C(); // where C has its own properties x and y
    Coord R = new R(); // where R has its own properties x and y
}

尝试这个:

function Coord(x, y) {
    this.x = x;
    this.y = y;
}

function Ellipse(text, cx, cy, rx, ry) {
    this.text = text;
    var c = new Coord(cx, cy);
    var r = new Coord(rx, ry);
}

我不知道您如何看待Coord C = new C()但这是绝对错误的。 JavaScript变量没有类型。

另外,您从哪里获得TextCxCy等? 它们不应该作为参数传递给构造函数吗?

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