There are many Javascript frameworks out there. One of the most respected is jQuery, released many years ago and continuously being improved, it is a tool when building the frontend of any web project.
We use their latest stable version in most of our projects.
Some nerds want to know what's under the hood. We are the same kind.
Our AX3 Framework is a group of methodologies and tools, improved over the past 14 years with hundreds of projects. Here are some we use: