https://stackoverflow.com/questions/59895063/flask-excel-download-with-ajax? https://flask.palletsprojects.com/en/1.1.x/patterns/jquery/ https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-xiv-ajax https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-v-user-logins https://github.com/thomaxxl/safrs https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-xiv-ajax https://www.bogotobogo.com/python/Flask/Python_Flask_with_AJAX_JQuery.php https://stackoverflow.com/questions/55876193/how-do-i-make-changes-in-a-particular-react-component-from-a-flask-server? https://stackoverflow.com/questions/51033646/flask-with-fetch-api-and-render-template-receive-new-rendered-data? https://stackoverflow.com/questions/54106028/javascript-fetch-api-and-python-flask-header-issue? https://stackoverflow.com/questions/46971451/cors-request-made-despite-error-in-console? https://stackoverflow.com/questions/57629155/asyncio-function-works-when-called-from-script-but-not-from-flask-route? https://stackoverflow.com/questions/40228556/asyncio-in-flask-restful