How to return an object from a function?

Question

JavaScript

I can't figure out what my mistake is, return immediately returns an empty object.

function manipulate_slides_array(array, url) {
    var objectData;
    var objectResponse = $.post(
      url,
      {
        slidesArray: array,
      },
      function (data, status) {
        var isString = true;
        try {
          objectData = JSON.parse(data);
        } catch (e) {
          isString = false;
        }
        if (isString == false) {
          M.toast({
            html: data,
          });
        }
        // console.log("Data: " + data + " " + status);
      }
    );
    objectResponse.done(() => {
      console.log("data from server --- ", objectData);
      return objectData;
    });

  }

Answer 1

Because asynchrony. The handler must be inside the .done callback.