implement a singleton klass with redefine constructor pattern and IIFE.
// Constructor way
function SingletonKlass() {
var instance;
SingletonKlass = function SingletonKlass() {
return instance;
}
SingletonKlass.prototype = this;
instance = new SingletonKlass();
instance.constructor = SingletonKlass;
// properties.
instance.createdTime = 0;
instance.getRandNum = Math.random();
return instance;
}
// IIFE way
var SingletonKlass;
(function() {
var instance;
SingletonKlass = function SingletonKlass() {
if(instance){
return instance;
}
instance = this;
// properties.
instance.createdTime = 0;
instance.getRandNum = Math.random();
};
}());