js

const xhr = new XMLHttpRequest();
console.log("UNSENT: ", xhr.status);

xhr.open("GET", "/server");
console.log("OPENED: ", xhr.status);

xhr.onprogress = () => {
  console.log("LOADING: ", xhr.status);
};

xhr.onload = () => {
  console.log("DONE: ", xhr.status);
};

xhr.send();

/**
 * Outputs the following:
 *
 * UNSENT: 0
 * OPENED: 0
 * LOADING: 200
 * DONE: 200
 */