Question

In a page I create an instance of a class (MyClass), this class has 2 methods. But I’d like to do 2 things :

1. In (1), set the value this.message
2. In (2), call the information method or another method of the class

Thank,

<script type="text/javascript">
    $(document).ready(function () {
        var myClass = new MyClass("MyParam");
        $('#Target').click(function (event) {
            myClass.save("Test");
        });
    }); 
</script>

function MyClass(myParam) {
    this.myParam = myParam;
    this.isError = false;
    this.message = "";
}

// Define the class methods.
MyClass.prototype = {
    save: function (action) {
        **(2)**
    },
    information: function (action) {
        **(1)**
    }
};

Update1

When I execute the code below the data value in information is show as undifined

MyClass.prototype = {

    click: function (action) {
        var myData;
        $.post(....., $("form").serialize(),
            function (data) {
                myData = data;
            });

        this.isError = this.information(myData);
    },

    information: function (data) {
        alert(data);
        return true;
    }

};

Answer 1

Inside the save and information functions, this should be the current MyClass object.

So, inside save, this.message should work, and inside information, this.save() should work.

UPDATE:

click: function (action) {
    var myData;
    $.post(....., $("form").serialize(),
        function (data) {
            myData = data;
        });

    this.isError = this.information(myData);
}

$.post is an AJAX request and is ran asynchronously. Meaning that this.isError = this.information(myData); is ran before it finishes, therefore myData is undefined. You need to call this.information from inside the callback.

Inside the callback, this will no longer be your MyClass object, so we need to save a reference to it. Like this:

click: function (action) {
    var that = this;
    $.post(....., $("form").serialize(),
        function (data) {
            that.isError = that.information(data);
        });
}