javascript--Package

Encapsulation: The advantage of using object encapsulation is that you can reduce the chance of global variable contamination by speaking of properties, functions are subordinate to an object.

Before encapsulation:

<Script> 　　 varname="Foo"; //name is global and is exposedI=1; //globally, the variables declared without the VAR keyword are global and have little to do with location 　　 functionShow () {//Show is global, exposedConsole.log ("name->"+name); Console.log (++i); }//I is the Global 2Show (); //3Show ();</Script>

Operation Result:

After encapsulation:

Only exposed bar, using closure package    var bar=function () {    var i=1;        return{            Name: "Bar",            show:function () {            console.log ("name->" +this.name);            Console.log (++i);    };}; var bar1=bar ();    2    bar1.show ();    3    bar1.show ();    var bar2=bar ();    2, because it is encapsulated, and the closure, I is the local private    bar2.show ();

Operation Result:

javascript--Package