This library is no longer maintained. If you're looking for an alternative you can check out Pintura Image Editor. It supports every ImagerJs feature and much more (resizing, free rotating, color adjustment, photo filters, annotating, etc).
What is ImagerJs? How can I use it?
Here you will find more informations about features and a short faq: ImagerJs
And here you'll find some examples and you can test it live: ImagerJs on GitHub
Here you will find a detailed documentation about the usage and its configuration: ImagerJs-Docs
Here are the release notes of the deployment since 2015: ImagerJs-Release Notes
If you want to contribute or just help with PR, please contact me!
Check out our WYSIWYG HTML canvas editor DrawerJs!