How to declare a static variable in Javascript [duplicate]

Answer 1

You can also make your counter variable "private", declaring it as local to a closure. It's the best way to have something similar to private - static variables:

var Person = (function() {

    var counter = 0;

    return function() {
        counter++;
        this.name = "Peter";
        alert(counter);
    };
})();


var p1 = new Person();
var p2 = new Person();

Example: https://jsfiddle.net/patodiblasi/67wucsqx/