Why is this pointing to parent Class, and not to window object ? Not this inside of Klass function.
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"
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