# Axios Refresh Token On React

`<ApiProvider />` component, that will handle token refresh if needed. Refresh function should, probably, be passed through component props.

    import axios from "axios";import React, {  createContext,  FC,  PropsWithChildren,  useCallback,  useContext,  useEffect,  useRef,} from "react";interface APIProviderProps extends PropsWithChildren {  tokens: {    access: string;    refresh: string;  };  logout: () => void;}const APIContext = createContext({  client: axios.create({    baseURL: process.env.NEXT_PUBLIC_API_ENDPOINT,  }),});const APIProvider: FC<APIProviderProps> = ({     tokens,     logout,     children,}) => {  const client = useRef(    axios.create({      baseURL: process.env.NEXT_PUBLIC_API_ENDPOINT,    })  ).current;  const refreshTokens = useCallback<() => string>(() => {    // TODO: implement me    throw new Error("not implemented");  }, []);  useEffect(() => {    if (!tokens.access) {      return;    }    // append `access` token to all requests    const req = client.interceptors.request.use(      async (config) => {        config.headers = {          Authorization: `Bearer ${tokens.access}`,        };        return config;      },      (error) => {        Promise.reject(error);      }    );    // refreshing interceptor    const resp = client.interceptors.response.use(      (response) => {        return response;      },      async function (error) {        const originalRequest = error.config;        if (error.response.status === 401 && !originalRequest._retry) {          originalRequest._retry = true;          const newToken = refreshTokens;          return axios({            ...originalRequest,            headers: {              ...originalRequest.headers,              Authorization: "Bearer " + newToken,            },          });        }        logout();        return Promise.reject(error);      }    );    return () => {      axios.interceptors.request.eject(req);      axios.interceptors.request.eject(resp);    };  }, [client, tokens.access, tokens.refresh, refreshTokens, logout]);  return (    <APIContext.Provider value={{ client }}>        {children}    </APIContext.Provider>  );};export const useAPI = () => useContext(APIContext).client;export { APIProvider };