handle errors

The React team believes that server-side errors should be handled in the second then argument. But if an error occurs (an error in our logic) in the first argument of then, it will not be caught. So you think that logic errors should be caught elsewhere (maybe Error Boundary)?

fetch('https://jsonplaceholder.typicode.com/todos/1')
  .then(response => response.json())
  .then(json => {
     console.log(json)
     throw new Error('myError') // <= Error here
  },  
    (error) => {
       console.log(error) // <= do not work
    }).catch(error => console.log(error)) // <=  work

從 issue 中的 fetch 範例開始，將 then 的第二個引數與 catch 和 React Error Boundaries 進行比較。確認在第一個 callback 中拋出的錯誤如何傳播，然後找出相關的 React 文件頁面；一旦指南清楚地說明每種錯誤在哪裡處理，就將 issue 定義為已解決。