Function.name

function doSomething() {}

console.log(doSomething.name); // imprime en pantalla "doSomething"

var f = function () {};
var object = {
  someMethod: function () {},
};

console.log(f.name == ""); // true
console.log(object.someMethod.name == ""); // tambin true

var f = function () {};
console.log(f.name); // "f"

var object = {
  someMethod: function object_someMethod() {},
};
console.log(object.someMethod.name); // imprime "object_someMethod"

try {
  object_someMethod;
} catch (e) {
  console.log(e);
}
// ReferenceError: object_someMethod is not defined

var object = {
  // anonymous
  someMethod: function () {},
};

object.someMethod.name = "someMethod";
console.log(object.someMethod.name); // cadena vaca, someMethod es annimo

var o = {
  foo() {},
};
o.foo.name; // "foo";

function foo() {}
foo.bind({}).name; // "bound foo"

var o = {
  get foo() {},
  set foo(x) {},
};

var descriptor = Object.getOwnPropertyDescriptor(o, "foo");
descriptor.get.name; // "get foo"
descriptor.set.name; // "set foo";

function a() {}

var b = new a();

console.log(b.constructor.name); // imprime "a"