How to obtain the variable name which holds an object instance from within the object : Javascript

Question

I am not able to figure out a dynamic/general way to achieve this. What I want is to get the name of the variable which holds the initiated object from within the object functions.

Its kind of hard to explain this without an example. I dont know if there is a "technical/programmatic" name for such a procedure.

Take an example

I initiate an object as..

var jTest = new boom('hi');

I have the objects constructor as..

function boom(message){
   console.log(message+' - '+objname);
   // what I want in the value of 'objname' is 'jTest'
   // I want to know dynamically what is the name of the variable that is going to hold this object instance (in this case 'jTest').
   // so that when I create html elements from this object
   // and they later have events I get a way to access the object instance
   // from inside the event functions.

   // for eg
   this.ref = document.createElement('div');
   this.ref.setAttribute('style','display:block;width:100px;height:100px;background:#f00');

   this.ref.setAttribute('data-obj',objname); // <- this obj name contains jTest or whatever name this object instance is stored as
   // then if i saved a name 'jTest' inside the element attr as a ref for later

   this.body.appendChild(this.ref);
   this.ref.addEventListener('click',(function(event){
       // this  - over here it refers to the element not the object instance jTest or any other forsaken name
       jTest.dance(); // now i want to run an object property called dance()
       // how to do this dynamically...?
       // you need to know the name of the variable that holds this object instance
       // so that you can call its property
       // this is where the attr "data-obj" value 'jTest' will help !
   }),true);
}

I want to know the literal name of the variable(in this case 'jTest') which contains the reference to the newly created object instance from inside of the object.

So that I can set an identifier, class (.jTest) to the html elements I create from inside of the object.

So when I have events on those html elements I will know which instance created them and I can access the appropriate object functions.

Hope this is understandable. I will try to update the description as i get new ideas to explain myself. Also suggest me other ways to solve this problem 'A way to know and call an object instance that created an element from inside the elements event(hover / click) function'.

Answer 1

I think you should be looking at this question : Determine name of a JavaScript object instance's class

But, the object jTest is not a "name", but pointer to the object. The big question here should be: why would you want to know the name of the pointer to the instance you're working with? You could always pass the instance you're working with to another object with this. (see: http://www.quirksmode.org/js/this.html )