var numberOfAjaxCAllPending = 0;

// Add a request interceptor
axios.interceptors.request.use(function (config) {
    numberOfAjaxCAllPending++;
    // show loader
    return config;
}, function (error) {
    return Promise.reject(error);
});

// Add a response interceptor
axios.interceptors.response.use(function (response) {
    numberOfAjaxCAllPending--;
    console.log("------------  Ajax pending", numberOfAjaxCAllPending);

    if (numberOfAjaxCAllPending == 0) {
        //hide loader
    }
    return response;
}, function (error) {
    numberOfAjaxCAllPending--;
    if (numberOfAjaxCAllPending == 0) {
        //hide loader
    }
    return Promise.reject(error);
});