CoffeeScript vs Skulpt

CoffeeScript is a language that compiles to JavaScript, so its output runs without a CoffeeScript interpreter. It can use existing JavaScript libraries, and JavaScript can use libraries written in CoffeeScript. Version 2 produces modern JavaScript syntax, including classes and arrow functions, and supports async functions and JSX. The `coffee` command runs scripts, compiles `.coffee` files to `.js`, and opens an interactive REPL; it can also generate inline or external source maps. Install it through npm, globally or as a project dependency. The core compiler can run in a browser or another JavaScript environment, while the command-line utility requires Node 6 or later. Its Node API compiles CoffeeScript strings and can return source maps or an abstract syntax tree. Babel transpilation is available when `@babel/core` is installed. The integrations section links to build tools, editors, frameworks, linters, formatters, and testing resources. JSX output always needs transpilation, and users must ensure their runtime supports the modern features they use or transpile the result. CoffeeScript is free and open source.

Skulpt is a free, web-based implementation of Python that executes code entirely in the browser. It requires no preprocessing, plugins, or server-side support. The online editor provides indentation, standard editing shortcuts, and keyboard commands to run all code or only a selection. Developers can embed Skulpt in a webpage or HTML project by loading `skulpt.js` or `skulpt-min.js` together with `skulpt-stdlib.js`, and they can create and host custom modules. The usage guide also describes embedding Trinket examples in an iframe, remixing them, and saving work to a free Trinket account. Skulpt is presented for learning and teaching Python, with a project gallery for educational examples. Its master branch uses Python 3.7.3 grammar, while Python 2 remains available for projects needing it. Documentation says language coverage is incomplete, with some features missing or partial. The runtime may use MIT or PSFLv2 licensing. CLI and API access are listed.