Vue.JS is a progressive JavaScript framework created by Evan You, formerly of Google. It was first released in 2014 and is growing in popularity as an alternative to AngularJS and React. Key features include declarative rendering, dependency tracking for automatic re-renders, and directives for DOM manipulation. Developers can get started by adding Vue to an HTML page or with single file components using tools like Webpack. The documentation provides many examples for building interfaces with directives, conditional rendering, forms, and more. While still smaller than communities for Angular and React, Vue has growing support from companies and an active ecosystem of libraries.