quill

Quill ensures consistent performance across modern browsers by handling complex document models without relying on browser-specific quirks, as emphasized in its documentation for reliable rich text editing.

The editor's architecture allows developers to add custom formats, themes, and UI modules via a modular setup, enabling deep customization without hacking core code, as shown in the Quickstart example with toolbar configuration.

With a clean JavaScript API, Quill provides full programmatic access to content, selection, and history, making it ideal for integration into complex applications, as demonstrated in the initialization and configuration options.

Uses a JSON-based Delta format for document representation, facilitating efficient content manipulation and potential collaboration features, which is a core part of Quill's design for advanced use cases.