javascript - 破坏的麻烦

Question

有一个if条件结果console.log他们什么也没打印，并出现在浏览器控制台 TypeError: Cannot read property 'to' of undefined 上instance.interceptors.response.use(        (res) => {            const { pathname } = window.location;            const isRedirect = res.status === HTTP_TEMPORARY_REDIRECT;            const data = { isRedirect, data: res.data };            if (isRedirect) {                console.log(`pathname: ${pathname}`);                console.log(`isRedirect: ${isRedirect}`);                const { redirectDataSource: { to: redirectRoute, ...redirectData } }                 const {                    redirectDataSource: { to: redirectRoute, ...redirectData },                } = res.data.error || res.data;                console.log(`redirectRoute: ${redirectRoute}`);                console.log(`redirectDataSource: ${redirectDataSource}`);            }            return Promise.resolve(data);        },        ...

Answer 1

redirectDataSource如果未定义，您需要添加默认值

let res = {

  data: {

    error: undefined,

    redirectDataSource: undefined

  }

}

const {

  redirectDataSource: {

    to: redirectRoute,

  } = {to: 'defaultValue'}

} = res.data.error || res.data;

console.log(redirectRoute)