Get current function name in strict mode

Question

I need the current function name as a string to log to our log facility. But arguments.callee.name only works in loose mode. How to get the function name under "use strict"?

Answer 1

For logging/debugging purposes, you can create a new Error object in the logger and inspect its .stack property, e.g.

function logIt(message) {
    var stack = new Error().stack,
        caller = stack.split('\n')[2].trim();
    console.log(caller + ":" + message);
}

function a(b) {
    b()
}

a(function xyz() {
    logIt('hello');
});

Answer 2

You can bind function as its context then you can access its name via this.nameproperty:

function x(){
  console.log(this.name);
}
x.bind(x)();

Answer 3

After little research here is a good solution :

function getFnName(fn) {
  var f = typeof fn == 'function';
  var s = f && ((fn.name && ['', fn.name]) || fn.toString().match(/function ([^\(]+)/));
  return (!f && 'not a function') || (s && s[1] || 'anonymous');
}



function test(){
    console.log(getFnName(this));
}

test  = test.bind(test);

test(); // 'test'

Source : https://gist.github.com/dfkaye/6384439