反应 axios 然后工作但 catch 不起作用

Question

I've read the following questions but I couldn't find the solution.

• https://github.com/axios/axios/issues/960
• https://github.com/axios/axios/issues/41
• axios catch doesn't catch error

I wanna to get errors 400, 500, ... someone has said you should catch in then but I tried it and nothing happened. for test I wrote a function to get error 404, 400, ...

export const myAxios = url => {
  Axios.get(url)
    .then(response => {
      // Success
      console.log("then response ", response);
    })
    .catch(error => {
      // Error
      if (error.response) {
        console.log("error respone", error.response);
        // The request was made and the server responded with a status code
        // that falls out of the range of 2xx
        // console.log(error.response.data);
        // console.log(error.response.status);
        // console.log(error.response.headers);
      } else if (error.request) {
        // The request was made but no response was received
        // `error.request` is an instance of XMLHttpRequest in the
        // browser and an instance of
        // http.ClientRequest in node.js
        console.log("erros request: ", error.request);
      } else {
        // Something happened in setting up the request that triggered an Error
        console.log("Error message", error.message);
      }
      console.log("errors config : ", error.config);
    });
};

axios doesn't catch errors and browser console logs this:

xhr.js:172 GET http://localhost:3000/app/..../choices 404 (Not Found)
dispatchXhrRequest @ xhr.js:172
xhrAdapter @ xhr.js:11
dispatchRequest @ dispatchRequest.js:59
Promise.then (async)
request @ Axios.js:53
Axios.<computed> @ Axios.js:68
wrap @ bind.js:9
myAxios @ textaxios.js:4
(anonymous) @ List.jsx:14
commitHookEffectList @ react-dom.development.js:22030

Any tips or help will be appreciated.

packages:

   "axios": "^0.19.0"
   "react": "^16.12.0"

Answer 1

Your code seems fine, perhaps it's the local endpoint (resource) that you're trying to get to?

Here's an example using an example placeholder service:

 document.getElementById('btn-valid').addEventListener('click', () => { // Valid URL myAxios('https://jsonplaceholder.typicode.com/todos/1') }) document.getElementById('btn-invalid').addEventListener('click', () => { // Invalid URL myAxios('https://jsonplaceholder.typicode.com/todus/1') }) const myAxios = url => { axios.get(url) .then(response => { console.log('success', response); }) .catch(error => { console.log('error', error) }) }

 <script src="https://unpkg.com/axios/dist/axios.min.js"></script> <button id="btn-invalid">Invalid URL</button> <button id="btn-valid">Valid URL</button>

Additionally, you can try using Axios interceptors to 'intercept' requests or responses before they're handled by then or catch :

axios.interceptors.response.use(response => {
        // Any status code that lie within the range of 2xx cause this function to trigger
        // Do something with response data
        console.log('inside interceptor success')
        return response;
      }, error => {
        // Any status codes that falls outside the range of 2xx cause this function to trigger
        // Do something with response error
        console.log('inside interceptor error')
        return Promise.reject(error);
      });