Preserving a reference to “this” in JavaScript prototype functions [duplicate]

Answer 1

You can create a reference to the this object or you can use the with (this) method. The later is extremely useful when your using event handlers and you have no way of passing in a reference.

MyClass = function() {
    // More code here ...
}

MyClass.prototype.myfunc = function() {       
    // Create a reference
    var obj = this;
    this.element.click(function() {
        // "obj" refers to the original class instance            
        with (this){
            // "this" now also refers to the original class instance
        }
    });

}