为什么这指向父类，而不是窗口对象？不是克拉斯函数的内部。
function Class() {
function Klass() {
this.color="blue"
}
Klass.prototype.value = this; // when called this is pointing to Class
console.log(this) // "Class"
return Klass;
}
var One = new Class(); // new constructor is returned
var Two = new One(); // creating new object
Two.value
- Class // why ?
Two.value instanceof Class // true
Two.value包含Class的实例，而不是对该Class的引用。
function Class() {
function Klass() {
this.color="blue"
}
Klass.prototype.value = this; // this is in a closure
console.log(this) // "Class"
return Klass;
}
var One = new Class(); // new constructor is returned
var Two = new One(); // creating new object
Two.value
- Class // this is always refer to "One"