I have a question about the talk by Philip Roberts ("Help, I'm stuck in an event-loop").

In the following code, assuming that there are no read errors, is the load callback guaranteed to be always executed? I.e. are DOM events dispatched only after the call stack is cleared?

  let main = () => {
    let reader = new FileReader();
    reader.readAsText(file);
    reader.addEventListener("load", callback = (event) => console.log(event.target.result));
  };