Simple rectangle and point classes
Try the demo. (This demo just shows one or two features; it's really just a test harness.)
Detailed API docs can be found here.
This repo has a git submodule, a folder called .\jsdoc-template.
On GitHub, it appears as a folder but is actually a pointer to another repo (similar to a linux symbolic link).
On your local it is a normal folder with a copy of that other repo's contents.
Important: When cloning this repo, it is also necessary to clone the submodule. See the submodule's README for instructions.