JS Implementation interface

How the interface is implemented

/** * Interface class * @param {String} name Interface name * @param {Array} methods interface method array 
    */function Interface (name, methods) {//check variables, input parameters must be 2                if(Arguments.length!==2) {                    Throw NewError ("State one interface require 2 parameters"); }                 This. Name =name;  This. Methods = []; if(Methods.length <=0) {                    Throw NewError ( This. Name +": Interface method must state"); }                 for(vari =0; i < methods.length; i++) {                    if(typeofMethods[i]!=="string") {                        Throw NewError ( This. Name +": "+ Method[i] +": Interface method must be string"); }                     This. Methods.push (Methods[i]); }            }                        //Create an interface            varComposite =NewInterface ("Composite", ["Add","Delete"]); //classes that implement interfacesfunction Compositeimpl () {} Compositei Mpl.prototype.add=function () {Console.log ("Add ...");                        }; CompositeImpl.prototype.delete=function () {Console.log ("Delete ...");                        }; //declare an instance            varC1 =NewCompositeimpl (); /** * Check method * @param {Object} object*/function Checkclassimplementinterface (Object) {                if(Arguments.length <2) {                    Throw NewError ("Check interface is required 2 parameters"); }                                varImplementinterfaces = {};  for(vari =1; i < arguments.length; i++) {Implementinterface=Arguments[i]; varImplementinterfacemethods =Implementinterface.methods;  for(varj =0; J < Implementinterfacemethods.length; J + +) {                        if(!Object[Implementinterfacemethods[j] | |typeof Object[Implementinterfacemethods[j]]!=="function") {                            Throw NewError (Implementinterface.name +"."+ Implementinterfacemethods[j] +"ID Not method"); }                    }                }            }                        //Check if the class implements all interfacesCheckclassimplementinterface (C1, Composite); 

JS Implementation interface