2021-12-02
In October 2021 the jQuery Mobile library was "fully deprecated", and "Mobile 1.4 is not compatible with the new jQuery Core. New technologies for mobile app development have evolved since this project was launched in 2010, so we're encouraging developers to plan for this jQuery Mobile transition." See: https://jquerymobile.com/.
It might be prudent for pop to download and deploy his own version 1.4.5 and host it, rather than relying on the project to be persistently hosted in the cloud/CDN.
Here's a dated discussion of platforms and IDEs for developing mobile "apps of the future:" https://www.devx.com/blog/jquery-and-phonegap-rule-for-mobile-web-app-development.html. PhoneGap aka Apache Cordova gets a nod.