How to load image from javascript block

[helicoptur]

Load image as costume from URL

I'm pretty sure external resource loading is asynchronous so the above code would be like (assigning calling this function to a Snap! variable) let sound = null; const audio = new Audio(src); audio.onload = () => { sound = new Sound(audio, costumeName); }; return () => sound; wait until (call (sound) :: control) report (call (sound) :: control) :: control