The domterm application is terminal emulator, REPL console, and screen multiplexer (like tmux or GNU screen).

The user interface and terminal emulation is handled by a JavaScript library (called DomTerm). Communication between the application and the UI is done with Web Sockets.

This article provides an overview of the functionality. This old LWN article provides background, motivation, and a summary of the functionality.

The name “DomTerm” is due tp that it works by manipulating the Document Object Model (DOM) of a browser: the nested structure of elements, text, and attributes. (Also, most other appropriate names were already taken...)

DomTerm is Free Software (open-source) available at The older JWebTerminal project was based on similar concepts, but was mostly written in Java using Javafx WebView.

Recent advances:

Why another terminal emulator

The goal of this project is to combine two related but separate tools: a terminal emulator, and a rich-text console, and do it properly.

There are many terminal emulators, including quite a few written in JavaScript. However, they generally work with a rectangular grid of characters, and don’t integrate rich text (images, math, variable-width text, variable-length lines, interaction) well.

There are also various tools designed for REPL-style interaction, chat clients, etc. Examples include IPython or the the JavaScript console of a web browser. However, they don’t work as terminal emulators, or at best have limited functonality or require switching modes.

For rich text applications it seems obvious to use web technologies: DOM and JavaScript.

One goal of this project is a stand-alone terminal emulator application that techies can use as a day-to-day terminal emulator, and that also seamlessly provides support for rich text and interaction. That means an embedded web engine.

The core of the project is a JavaScript package that can be used and embedded in different modes and applications.