Vue is a popular JavaScript framework for building web applications, making it a common job requirement or preferred skill. It is lightweight in how it can be incrementally integrated into your sites. It also makes it easy to build sophisticated single page apps (web apps that have a desktop-app feel).
This set of lessons will give you an excellent overview of the framework and the JavaScript skills needed to get up and running. You'll build the classic To-Do List app as a way to learn common techniques and best practices.
These lessons are taught by JavaScript developer Josh Castle. Castle has a gift for explaining concepts in simple fashion and is currently a teacher of mathematics and computer science for high schoolers.