TermDOM

happy-dom is a JavaScript implementation of a web browser without a graphical user interface. It recreates DOM and browser APIs for running and testing browser-dependent code in Node.js and other lightweight environments. Its supported features include custom elements and declarative shadow DOM, mutation observers, tree walkers, and the Fetch API. It works with testing and frontend ecosystems including Vitest, Bun, Jest, Testing Library, LitElement, Vue, React, Svelte, Angular, and web components. happy-dom is distributed under the MIT License. The project is maintained by David Ortner and hosted on GitHub.

Mador.js is a small reactive DOM runtime for adding state-driven behavior to existing HTML without a framework. It exposes reactive state and DOM bindings through a native ES module: bindings select elements, read selected state, and run update callbacks with the resulting values. Mador tracks the properties read by each binding and reruns only affected bindings; writes are batched so multiple state changes are processed together. Bindings are associated with the DOM elements they update, allowing their reactive runners to be removed when those elements disappear. It has no components, templates, virtual DOM, global runtime, or required build step, and is distributed through npm or a CDN under the MIT license.

Node.js is an open-source, cross-platform JavaScript runtime environment used to run server-side and other JavaScript applications. The videos describe it as a common runtime and application stack for web applications, including full-stack TypeScript projects, while the official project repository documents Current, Long Term Support (LTS), and nightly release channels. The project uses an open governance model and is supported by the OpenJS Foundation; it is distributed under the MIT license.

Octane is an open-source JavaScript UI framework and successor to Inferno, developed by Dominic Gannaway. It uses a compiler to turn React-style components into direct DOM code before they ship, removing the virtual DOM and manually maintained dependency arrays while retaining familiar APIs such as useState, useEffect, memo, context, portals, Suspense, and transitions. Components can use standard JSX or Octane's .tsrx syntax, which adds template directives such as @if, @for, @switch, and @try. The compiler derives hook dependencies from captured values, tracks hooks by call site rather than call order, and rejects hooks in plain JavaScript loops; keyed @for is provided for per-item hook state. The runtime uses delegated native DOM events, plain ref props, compiled render paths, and an LIS-based keyed reconciler. The native renderer does not include class components, Server Components, or a synthetic event system.

hqtui is a TypeScript terminal UI library developed by profullstack for building btop-style dashboards with a one-import API and zero runtime dependencies. It renders directly through ANSI/VT sequences using a typed-array cell framebuffer, differential rendering, truecolor with automatic 256- and 16-color fallback, and Braille or block graphics, without ncurses, a browser DOM, React, native add-ons, or network access. Its API provides layouts, panels, tables, trees, logs, meters, graphs, forms, dialogs, themes, mouse input, and responsive terminal handling. A headless renderer can produce text, screen, ANSI, or HTML output for testing without a TTY. Bun is the default runtime; Node 22.6 or newer is supported, with best-effort Deno support. The project is MIT-licensed and includes a demo dashboard with real or simulated system metrics.