Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
Reveal elements as they enter the viewport.
Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.