在javascript中使用内部对象文字之间的函数

Question

My issue is I have 2 inner objects in my js class and I'm trying to use the methods from one of those objects in my other object (examples of what I'm trying to do below). I understand why this doesn't work because of a the scope. I'm just wondering if there is a way to get it to work.

var Class1 = {

    self : this,
    Obj1 : {

        Obj1Method : function () {
            alert("Do something");
        },
        Obj1Method2 : function () {
            alert("Do something else");
        },

        InnerObj1 : {
            InnerNestObj1Method : function (val) {
                alert(val + 2);
            }
        }
    },

    Class1Method2 : function () {
        this.Obj1.Obj1Method2();
    },

    Obj2 : {

        Obj2Method : function (val2) {
            self.Obj1.InnerObj1.InnerNestObj1Method(val2);
        },

        Obj2Method2 : function () {
            self.Class1Method2();
        }
    }
};

Class1.Obj1.InnerObj1.InnerNestObj1Method(3); //works
Class1.Class1Method2(); //works
Class1.Obj2.Obj2Method2(); //No bueno
Class1.Obj2.Obj2Method(5); //No bueno

Answer 1

You can fix your example by replacing self with Class1 . The line self : this, is setting Class1.self to point to the global object ( this when that line is evaluated).

 var Class1 = { self : this, Obj1 : { Obj1Method : function () { alert("Do something"); }, Obj1Method2 : function () { alert("Do something else"); }, InnerObj1 : { InnerNestObj1Method : function (val) { alert(val + 2); } } }, Class1Method2 : function () { this.Obj1.Obj1Method2(); }, Obj2 : { Obj2Method : function (val2) { Class1.Obj1.InnerObj1.InnerNestObj1Method(val2); }, Obj2Method2 : function () { Class1.Class1Method2(); } } }; Class1.Obj1.InnerObj1.InnerNestObj1Method(3); //works Class1.Class1Method2(); //works Class1.Obj2.Obj2Method2(); //bueno Class1.Obj2.Obj2Method(5); //bueno 

What happens when you do self: this

// If this is running in non strict mode, from the global scope, `this` points
// To the global object because there was no function call setting `this`
var Class1 = {
    self : this,
};

What you need to understand is that this is set by whoever called the function using this . In the example above, there is no caller, so the runtime sets this to point to the global object.

Here's how you could you could make your object a bit more reusable and give yourself a reference to the outer object:

 function createClass() { var self = { Obj1: { Obj1Method: function() { alert("Do something"); }, Obj1Method2: function() { alert("Do something else"); }, InnerObj1: { InnerNestObj1Method: function(val) { alert(val + 2); } } }, Class1Method2: function() { self.Obj1.Obj1Method2(); }, Obj2: { Obj2Method: function(val2) { self.Obj1.InnerObj1.InnerNestObj1Method(val2); }, Obj2Method2: function() { self.Class1Method2(); } } }; return self; } var Class1 = createClass(); Class1.Obj1.InnerObj1.InnerNestObj1Method(3); //works Class1.Class1Method2(); //works Class1.Obj2.Obj2Method2(); //works Class1.Obj2.Obj2Method(5); //works 

Answer 2

You can do it with Classes :

 "use strict" class Class1 { constructor() { this.Obj1 = { Obj1Method: function() { alert("Do something"); }, Obj1Method2: function() { alert("Do something else"); }, InnerObj1: { InnerNestObj1Method: function(val) { alert(val + 2); } } }; var self = this; this.Obj2 = { Obj2Method: function(val2) { self.Obj1.InnerObj1.InnerNestObj1Method(val2); }, Obj2Method2: function() { self.Class1Method2(); } }; } Class1Method2() { this.Obj1.Obj1Method2(); } }; var c1 = new Class1(); c1.Obj1.InnerObj1.InnerNestObj1Method(3); //works c1.Class1Method2(); //works c1.Obj2.Obj2Method(3); //works c1.Obj2.Obj2Method2(); //works