A single-instance pattern of JavaScript design patterns

Reference resources: In-depth understanding of JavaScript series by Uncle Tom

A single example is to ensure that a class has only one instance, the method of implementation is generally first to determine whether the instance exists or not, if there is a direct return, if it does not exist to create a return, this ensures that a class has only one instance object.

The object literal is the simplest single-case pattern:

var mysingleton = {    "a property",    function  () {        Console.log ( "This is a method");    };

A simple single-case

varMysingleton = (function () {    varinstance, init=function () {            return{property:"A Property", Method:function () {}            };    }; return{getinstance:function () {            returninstance | | (Instance =init ()); }    };}) ();varMysingle = Mysingleton.getinstance ();

Another single case

varMysingleton = (function () {    varSingleton =function(args) {varargs = args | | {};  This. Name = "a singleton";  This. Pointx = Args.pointx | | 6;  This. Pointy = Args.pointy | | 10;    }; varinstance; varExports ={getinstance:function(args) {if(Instance = = =undefined) {Instance=NewSingleton (args); }            returninstance;    }    }; returnexports;}) ();varMysingle =mysingleton.getinstance ({pointx:10, Pointy:10});

A single-instance pattern of JavaScript design patterns