🔰error handling

JS ⟩ asynchronous ⟩ await ⟩ error handling

💈範例

catch await errors by try...catch.

(async () => {
  // catch await errors by try...catch statement.
  try {
    let response = await fetch(url);
  } catch(err) {
    console.log(err);
  }
})();

catch async function errors by Promise.prototype.catch().

(async () => {
    let response = await fetch(url);
})().catch(err => {    // catch a rejected Promise returned by async func
    console.log(err)
});

📗 參考

• JS.info ⟩

  • async / await

  • error handling with Promises

👥 相關

• Promise ⟩ error handling

📘 手冊

• Promise.prototype.catch()
• unhandledrejection event