How to get the variable name as a string?

Hmm, yes nothing.
You can, however, make such a trick:

 (function() { var getVarName = function tmp(){ let n = /getVarName\(([^)]+?)\)/.exec(tmp.caller !== null ? tmp.caller.toString() : ''); return n !== null ? n[1] : false; } let myVarName123456 = 1; console.info(getVarName(myVarName123456)); // myVarName123456 }()); 

But this is a dirty hack, uncomfortable, and more than just a “make to dispute” than a worker; in real code, I don't even know who could use it.

Perhaps you should reconsider the architecture of your project, where the variable identifier is used as a dependent variable.
Variables just come up with not to depend on the names.

To get the name, you must wrap the variable with an object, like this:

 <script> var myVariable = {}; myVariable["myVariable"] = 5; // заварачиваем переменную в массив myVariable["myVariable"] = 7; // вот так работаем с переменной alert(myVariable["myVariable"]); // вот так получаем ее значение function getName(arrayVariable){ // функция для извлечения имени for (key in arrayVariable) return key; } alert(getName(myVariable)); // извлекаем имя </script> 

The variable does not store such information about itself, which means you will not be able to get its string representation of the name.

The maximum that you can do is to know the context of a variable and try to get its name through the parent. And that, if only this variable is reference object, instead of a value variable.

 function context(){ this.a = { "test" : "test" }; for(key in this){ if(this[key] == a) console.log(key); } } context(); 

This can be done, but the variable must be an object, and it must be given a unique property or method by which it can be distinguished in the list of other variables. You can get and sort through the list of variables among which the required one is found, inside the document you can

 for (var variable in window) { //Анализ variable - она или не она } 

Inside you need to use eval and typeof to access the object by its name and determine the presence of a unique property / method. It loads the client’s browser a bit, but it works. Tested in Fox.

Here is an example.

 var Class = function() { } Class.prototype.isOurVariable = function() {return true}; var object123 = new Class(); //Ищем имя этой переменной for (var variable in window) { if (!/[az]+/.test(variable)) { //отсекаем свойства типа "0", есть такие continue; } eval("var ok = (" + variable + " != null && typeof (" + variable + ".isOurVariable) != 'undefined');"); if (ok) {console.log(variable); break} }