Quill is a modern WYSIWYG (What You See Is What You Get) editor that is built for compatibility and extensibility. It was developed by Jason Chen and Byron Milligan and is currently maintained by Slab.

Here are some of Quill's key features and benefits:

• Developer-focused: Quill provides granular access to the editor’s content, changes, and events through its API. It consistently and deterministically uses JSON for input and output.

• Cross-Platform: Quill is supported on all modern browsers for desktops, tablets, and phones. It produces consistent HTML across platforms.

• Customization: Quill is used by both small companies and large corporations.

You can begin with the basic Quill core and then customize it or add your own extensions.
You can get started with Quill by checking out its website for documentation, guides, and live demos.

There is also a Quickstart guide available in the sources. You can install Quill using npm or a CDN.