JS inheritance

FooBar.js

var Bar = (function(parent) {

    // constructor
    var cls = function Bar(/* ... */) {
        parent.call(this, /* ... */);
        /* ... */
    };
    
    // inheritance
    inherits(cls, parent);
    
    // methods
    cls.prototype.baz = function() {
        /* ... */
    );
    
    return cls;

})(Foo);

inherits.js

var inherits = function(child, parent) {
    child.prototype = Object.create(parent.prototype);
    child.prototype.constructor = child;
}