lets say you want to intercept your axios request and also trigger redux-reducers in the process, this is the way to go about it...

axios-redux-interceptor.js

import axios from "axios";
import * as config from './Settings';   //get app settings.. 
import { store } from '../index';

//initialize headers... 
const headers = { 'Content-type': 'application/json; charset=UTF-8' };


//use interceptors to catch all axios events.. loading events... 
// Add a request interceptor
axios.interceptors.request.use(function (config) { // Do something before request is sent
  store.dispatch({ type: 'AJAX_PROGRESS' });    //dispatch events to the redux-store 
  return config;
}, function (error) {
  //store.dispatch({ type: 'AJAX_COMPLETE' });
  return Promise.reject(error); // Do something with request error
});

// Add a response interceptor
axios.interceptors.response.use(function (response) {
  store.dispatch({ type: 'AJAX_COMPLETE' });
  return response;    // Do something with response data
}, function (error) {
  //store.dispatch({ type: 'AJAX_COMPLETE' });
  return Promise.reject(error);   // Do something with response error
});

//implement public apis... 
export const allPosts = () => axios.get(`${config.root_url}/posts`, headers);
export const createPost = (post) => axios.post(`${config.root_url}/posts`, post);