How to get data from a callback function?

Question

JavaScript

How can I get data (data) from the function "successFunc" in the scope of the function "myFunc"?

function myFunc () {
  var val = 5;
  
  $.ajax({
    url: url,
    type: "POST",
    dataType : "json",
    data: {},
    success: successFunc
  });
  
  function successFunc (data) {
    data = data;
  }
  
};

https://codepen.io/Slolov/pen/aEOyKo?editors=0010