With the 2014 release of the new HTML5 standards, browsers gradually ceased supporting plug-ins, such as Java.
In 2018-2019, Physlet Java Applets were ported to JavaScript/HTML5 in collaboration with Robert Hanson (St. Olaf College) using the java2script-SwingJS platform, which allows Physlet-based materials to run on any platform (desktop, laptop, tablet, phone) using any recent JavaScript-enabled browser.
On July 1, 2018, the third, all electronic, JavaScript version of the book, Physlets Physics 3E, was released under a Creative Commons Attribution-NonCommercial-NoDerivs License on the ComPADRE National Science Digital Library.
[1] On April 15, 2019, the third, all electronic, JavaScript version of the book, Physlets Quantum Physics 3E, was released under a Creative Commons Attribution-NonCommercial-NoDerivs License on the ComPADRE National Science Digital Library.
[2] Physlets are small, flexible Java applets that can be used in the teaching of physics and other sciences.