JavaScript - Get name by which function has been called

Question

Is it possible to get string "markHotel" in this code?

this.markHotel = this.markPrice = function() {
 // get "markHotel"
};
this.markHotel();

• Rob M.: stackoverflow.com/questions/2648293/…
• James Thorpe: @RobM. The issue here is that the function itself is anonymous and has no name. I'm not sure you can do what the OP is asking here.
• James Thorpe: If you really need to do this (it looks a bit smelly - is this an XY Problem?), you could make markHotel and markPrice independent functions that call into your anonymous function, passing in the name.
• VLAZ: @holden321 then it is an XY problem. You don't want to get what was called you just need common code. You can have something like function common() { /* common code */ } and then something like (effectively) this.markHotel = function() { common(); /* more code*/ }. This can also be done with common accepting callbacks or functional composition or few other ways. Whatever the case, making the function changed based on how you called it is a code smell.
• VLAZ: function makeMarkFunction(callback) { return function() {/* common code */; callback()} } and then this.markHotel = makeMarkFunction(function() {/* markHotel specific stuff */}). It keeps your things nice and generic, you don't need to care what calls your function. You shouldn't need to care what calls it.

Answer 1

You could use Function.prototype.bind(). Here's a simple example:

function base() {
 console.log(this.name);
 // do some other stuff using this.name or other this props...
}
var markPrice = base.bind({ name: 'markPrice' });
var markHotel = base.bind({ name: 'markHotel' });
// this will log 'markPrice'
markPrice();
// this will log 'markHotel'
markHotel();

It looks like you may be doing this inside a class constructor, but it's not totally clear from your example. If that's the case, make sure not to confuse the class constructor's "this" context and the "base" function's "this" context, the latter being manually bound when setting markPrice and markHotel.

Docs for bind: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind

Here's a pen: http://codepen.io/bsidelinger912/pen/QKLvzL