Assign object to “this”

Question

Say I have a class and some static helper methods like this:

function MyClass (myVar) {
    this.myVar = myVar;

    this.replaceMe = function (value) {
             


        

Answer 1

How about just returning the new instance:

function MyClass(myVar) {
    // ...

    this.replaceMe = function (value) {
        return MyClass.staticHelper(this, value);
    }

    // ...
}

MyClass.staticHelper = function (instance, value) {
    return new MyClass( instance.myVar += value );
}