All the code developed in class can be found in the code repository; in particular, the tip of the vue_classes
branch contains the final version of the music player code; see https://bitbucket.org/luca_de_alfaro/web2py_start/branch/vue_classes and https://bitbucket.org/luca_de_alfaro/web2py_start/src/vue_classes/
In particular, have a look at:
The favorite / unfavorite code can be found at the tip of branch experiment-may-8-2018
; see e.g. https://bitbucket.org/luca_de_alfaro/web2py_start_2016/src/experiment-may-8-2018/views/default/index.html