JavaScript Object Lifecycle

Question

I have a Javascript class as shown below:

var MYCLASS = function(elem, data, op) {

    var options = {};

    var loopForEver = function() {
        console.log('I cant stop me');
        setTimeout(function() {
            loopForEver();
        }, 1000);
    }
    this.init = function() {
        loopForEver();
    }
}

when I instantiate the class and call the init function, the loop starts and I get the text in the console every 1 second:

var ins = new MYCLASS();
ins.init();

Why, when I set the instance to null, the thread does not stop? or at any time when I create a new instance and assign it to the name of the previous instance, it increases the number of calls.

in my production code, I don't have an infinite loop, but I have some business logic. Do I need to worry about performance when creating a new instance?

Answer 1

setTimeout, , . , timeOutID. , - - setTimeout, .

var MYCLASS = function(elem, data, op) {

    var options = {};
    var timeOutID = null;

    var loopForEver = function() {
        console.log('I cant stop me');
        timeOutID = setTimeout(function() {
            loopForEver();
        }, 1000);
    }
    this.init = function() {
        loopForEver();
    }
    this.stop = function () {
      clearTimeout(timeOutID);
    }
}

Answer 2

.

, , , , , - .

. . javascript, ? "

, setTimeout , , null.

" ( kangax) :

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... Variable ... . .

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, , .clearTimeout().