为什么 axios 不处理 'Content-Type': 'application/json'

Question

I'm making requests with Axios and everything works correctly, but if there is an error in the PHP API like: "Undefined index:...". Axios doesn't handle the error with 'Content-Type': 'application/json'

const API = axios.create({
  baseURL: URL + "/api/",
  headers: {
    'Content-Type': 'application/json',
  }
})
            let data = {
              orderList: {
                limit: 10,
                page: page,
                orderby: orderBy,
                search: search
              }
            };
            data = qs.stringify(data);
            let orderList;
            await API.post("api.php", data, {
              headers: {
                'Content-Type': 'application/json',
              }
            }).then(response => {
              orderList = response.data;
            }).catch(() => {
              orderList = 'Network Error';
            })
            return orderList;
          },

I wanted it to return only the JSON result from the API, if not, trigger catch. However catch is not being triggered.

Answer 1

use header like this

axios.defaults.headers.post['Content-Type'] = 'application/json';