Is there a “right” way to do inheritance in JavaScript? If so, what is it?

Question

I have been trying to learn how to add testing to existing code -- currently reading reading Working Effectively With Legacy Code. I have been trying to apply some of the princ

Answer 1

There are no class in javascript, only objects.
But if you insist on emulating the class based object-oriented model you can use this:

function ChildClass() {
    ParentClass.call(this);
    // Write the rest of your constructor function after this point.
};
ChildClass.prototype = jQuery.extend({}, ParentClass.prototype, ChildClass.prototype);

jQuery.extend is a 'shallow copy' function from the jQuery library. You can replace it with any other object copying/cloning function.