异步/等待

fetch('https://jsonplaceholder.typicode.com/todos/1')  .then(response => response.json())  .then(data => console.log(data))  .catch(error => console.error('error:', error))  .finally(() => console.log('all done'));

async function fetchdata() {  try {    const response = await fetch('https://jsonplaceholder.typicode.com/todos/1');    const data = await response.json();    console.log(data);  } catch (error) {    console.error('error:', error);  } finally {    console.log('all done');  }}fetchdata();

// simulate the order process with async/awaitasync function foodorder() {  console.log("ordering food...");  await new promise(resolve => settimeout(resolve, 2000)); // wait 2 seconds for food to be prepared  return "your food is ready!";}// simulate the eating processfunction eatfood(order) {  console.log(order); // this logs "your food is ready!"  console.log("enjoying the meal!");}// simulate continuing the conversationfunction continueconversation() {  console.log("while waiting, you continue chatting with friends...");}async function orderfood() {  console.log("you've arrived at the restaurant.");  const order = await foodorder(); // place the order and wait for it to be ready  continueconversation(); // chat while waiting  eatfood(order); // eat the food once it arrives}orderfood();

You've arrived at the restaurant.Ordering food...While waiting, you continue chatting with friends...Your food is ready!Enjoying the meal!