en.javascript.info/1-js/02-first-steps/15-function-expressions-arrows/1-rewrite-arrow/task.md

Rewrite with arrow functions

Replace Function Expressions with arrow functions in the code:

function ask(question, yes, no) {
  if (confirm(question)) yes()
  else no();
}

ask(
  "Do you agree?",
  function() { alert("You agreed."); },
  function() { alert("You canceled the execution."); }
);