SyntaxError: function statement requires a name

    Syntax Error: Expected identifier (Edge)
    SyntaxError: function statement requires a name [Firefox]
    SyntaxError: Unexpected token ( [Chrome]

?

(Function statement) . (Function expression) IIFE , .

vs

( ) :

function () {
  return 'Hello world';
}
// SyntaxError: function statement requires a name

var greet = function () {
  return "Hello world";
};

, IIFE (Immediately Invoked Function Expression) . :

(function () {})();

function :

function Greeter() {
  german: function () {
    return "Moin";
  }
}
// SyntaxError: function statement requires a name

function Greeter() {
  german: function g() {
    return "Moin";
  }
}

. function .

var greeter = {
  german: function () {
    return "Moin";
  },
};

. .

promise.then(
  function() {
    console.log("success");
  });
  function() {
    console.log("error");
}
// SyntaxError: function statement requires a name

json

promise.then(
  function() {
    console.log("success");
  },
  function() {
    console.log("error");
  }
);

IIFE

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SyntaxError: function statement requires a name

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