slab/quill

Quill is a rich text editor that you can embed in a web application to give users a formatted writing experience, think bold, italic, headings, lists, links, and images, similar to what you find in a blog CMS or a Google Docs-like interface. The problem it solves is that building a text editor from scratch that works consistently across all browsers and supports formatting, undo/redo, and copy-paste is extremely complex. Quill handles all of that complexity so developers can drop a functional editor into their applications with just a few lines of code. Quill is described as built for compatibility and extensibility. Compatibility means it handles the inconsistent ways that different browsers implement contenteditable (the mechanism that makes a div editable) and normalizes behavior so the editor works reliably everywhere. Extensibility means its functionality is built on a module system, every feature like the toolbar, keyboard shortcuts, history, and clipboard handling is a module that can be replaced or extended. The editor stores content in a custom JSON-based format called Delta, which makes it easy to apply, invert, and synchronize changes, including for real-time collaborative editing scenarios. The library is written in TypeScript and installed as an npm package. You would use Quill when building any web application that needs user-generated rich text content: a blogging platform, a note-taking app, a project management tool with formatted task descriptions, an email composer, or any comment system that needs more than a plain text box. It is embedded directly into the browser-side JavaScript of your application and can be connected to your backend to save and load content.