Foxtrot

Web terminal built on @xterm/xterm with a Korean input buffer. Designed to work around unstable Korean IME behavior in mobile browsers (especially iPhone Safari) when interacting directly with @xterm/xterm.

Features

• @xterm/xterm terminal — Full terminal emulation powered by @xterm/xterm
• Korean input buffer — Stable Hangul IME composition via a standard <input> field
• Multi-tab sessions — Multiple independent shell sessions with tab switcher
• Persistent sessions — Shells stay alive across browser reconnects
• Optional auth — JWT + SQLite login with --auth flag
• Special keys toolbar — ESC, TAB, Ctrl combos, arrow keys, function keys, and more
• Mobile optimized — Virtual keyboard doesn't push content off screen
• Dark theme — Terminal-native look and feel

Quick Start

npm install
node server.js

Open http://localhost:16000 in your browser.

Options

node server.js --port 8080       # Custom port
node server.js -w /tmp           # Custom start directory

Authentication

To enable login, set JWT_SECRET and pass --auth:

JWT_SECRET=your_secret_here node server.js --auth
JWT_SECRET=your_secret_here node server.js --auth -w ~/proj

JWT_SECRET is used to sign/verify JWT tokens (1-day expiry). If --auth is used without JWT_SECRET, the web UI will show a configuration error.

Tech Stack

• Backend: Node.js, Express, ws, node-pty, better-sqlite3, jsonwebtoken, bcryptjs
• Frontend: @xterm/xterm (CDN), xterm-addon-fit, single HTML file

License

MIT License

Copyright (c) 2026

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.