单例实践

var SingletonTester = (function (){
//参数： 传递给单例的一个参数集合
function Singleton(args) {
	// 设置args变量为接收的参数或者为空
 	var args = args || {};
 	//设置name参数
 	this.name = 'SingletonTester'
 	//设置pointX参数
 	this.pointX = args.pointX || 6;
 	//设置pointY参数
 	this.pointY = args.pointY || 10;
}
//实例容器
var instance;

var _static = {
	name: 'SingletonTester',
	//获取实例的方法
	//返回Singleton的实例
	getInstance: function (args){
		if (instance === undefined) {
			instance = new Singleton(args)
		}
		return	instance;
	}
}
return _static
}())
var singletonTest = SingletonTester.getInstance({ pointX: 5 })
console.log(singletonTest.pointX)