如何从javascript闭包内调用属性

Question

I have a javascript closure and inside the method getresult() . I want to call a property in the object quo .

var quo = function (test) {
        talk: function () {
            return 'yes';
        }
        return {
            getresult: function () {
                return quo.talk();
            }
        }
    }
var myQuo = quo('hi');
document.write(myQuo.getresult());

From inside getresult() , how can I call the property talk ?

Answer 1

your syntax is wrong, and you cant call talk from the quo reference, talk is not accessible from the outside, if you wanna call talk from quo then you have to add a reference to it in your returned object

var quo = function (test) {
    function talk() {
        return 'yes';
    }
    return {
        getresult: function () {
            return talk();
        },
        talk: talk
    }
}

Answer 2

quo is no object, but a simple function, and has no properties (technically, it could have, but that does not apply here).

var quo = function(test) {
     function talk() {
          return 'yes';
     }
     /* OR:
     var talk = function() {
          return 'yes';
     }; */

     return {
         getresult: function() {
             // in here, "quo" references the closure function.
             // "talk" references the local (function) variable of that "quo" function
             return talk();
         }
     }
}
var myQuo = quo('hi');

myQuo.getresult(); // "yes"

If you want to get a property " talk " on the myQuo object, you would need to use this:

var quo = function(test) {
    return {
        talk: function() {
             return 'yes';
        },
        getresult: function() {
             // in here, "quo" references the closure.
             // "this" references current context object,
             // which would be the the object we just return (and assign to "myQuo")
             return this.talk();
        }
    };
}
var myQuo = quo('hi');

myQuo.getresult(); // "yes"

Read more on the this keyword at MDN .