Change CSS with Nullish Coalescing operator in JavaScript

*New to Javascript

The code below is a section that changes the image source to the saved one.

Desired result: When there is no source for the image I want to display a ‘default.jpg’ image.

Perhaps, is there another way to write this logic out as a simple(r) condition?

Attempt

  set_image({
    image_data_url: items.image_data_url ?? "",
    image_filename: items.image_filename ?? image.src = './assets/default.jpg',
  });

Current

  set_image({
    image_data_url: items.image_data_url ?? "",
    image_filename: items.image_filename ?? "No Image",
  });