Building UI/UX demands designing an API for people to use not people's code to implement. The developer must take into account the "existing libraries" availabl

Building UI/UX demands designing an API for people to use not people's code to implement. The developer must take into account the "existing libraries" available to their end users (people or code) and the human equivalent of "libraries" is generally unspecified, varies greatly, and is slow to teach and learn.