JavaScript Object definitions and operations

There are three ways to define JS objects
There are three ways of defining JS methods
function fn () {}
var fun = function () {}
var fun = new function () {}
//******** *********************************//
<! DOCTYPE html>//var a = "123";        //function fn () {        //alert (a);        //var ab = "4321";        //        }        //fn ();        //new Object ();        //create a normal object        varA = 3, B = 9; varobj = {            //Defining PropertiesName: "123", Fun1:function () {            }        }        //obj.name = "haha";OBJ.FUN1 =function(A, b) {alert ("Iosdjfoij"); returnA +b; }        //Delete obj.name;        //alert (obj.name);        //Alert (Obj.fun1 (A, b));        //Constructor declaration, which can be understood as a class in Java, a class is an object        functionObj () {//In the constructor mode in Java             This. Name = "Hahaa";  This. fun1 =function(A, b) {returnA +b; }        }        //to use the constructor, you must instantiate the constructor, create the object        varOBJJ =NewOBJ (); Objj.name= "HelloWorld"; //Objj.fun1 (A, b) {        //return a+b;        //}        //Modify object, Format: Small object. Method Small object. Properties        //Add New Object        //format: Small object. New method =Objj.func23 =function () {            return("No. Third");        } alert (Objj.name);        Alert (objj.func23 ()); //Alert (Objj.fun1 (A, b));        //crud Operations on objects</script>
JavaScript Object definitions and operations