import { globalLoaderMiddleware }  from 'redux-global-loader';

composeStoreWithMiddleware = applyMiddleware(
    ...
    promiseMiddleware(),
    globalLoaderMiddleware,
    ...
)(createStore);

import { combineReducers } from 'redux';
import { loadingAll } from 'redux-global-loader';

...
combineReducers({
    ...
    loadingAll,
    ...
});
...

import { Loading }  from 'redux-global-loader';

...
render() {
    return (
        <Loading>
            ...
            // Your loading component here
            ...
        </Loading>
    );
}
...