Question

The following code works, but am I running the risk of causing circular reference or a memory leak?

/* core package */
var core = function() {
    // Throw an error, the core package cannot be instantiated.
    throw new Error('A package cannot be instantiated.');
};

core.Container = function (properties){
    this.constructor = this;
    this.id = null;
    if ('id' in properties)
        this.id = properties['id'];
    else 
        throw new Error('A container must have an id.');
}
core.Container.prototype = new Object();

var container = new core.Container({'id': 'container'});
alert(container instanceof core.Container); // Result is true

Answer 1

As posted by @Raynos in chat

@Utilitron depends what you mean by leaks are we talking leaks in
decent engines or leaks in IE6 That code shouldnt leak in v8