example of abstract, not instantiable, class in javascript

abstractClass.js

var AbstractClass = (function(){


	function AbstractClass() {
		if (this.constructor === AbstractClass) {
		   throw new Error("Can't instantiate abstract class!");
		}
	};


	AbstractClass.prototype.method1 = function() {
		throw new Error("Abstract method!");
	};


	return AbstractClass;
}());