JSCL is a Common Lisp to JavaScript compiler, which is bootstrapped from Common Lisp and executed from the browser.

You can try a demo online here, or you can install the JSCL npm package:

npm install -g jscl

to run jscl in NodeJS.

If you want to hack JSCL, you will have to download the repository

git clone https://github.com/jscl-project/jscl.git

Run npm install under the jscl directory, then run the build script:

./make.sh

It will generate jscl.js and the rest of the distribution files in the jscl/dist directory. Now you can open dist/index.html in your browser and use it. To use in Node, node dist/jscl-node.js; to use in Deno, deno --allow-env --allow-read dist/jscl-deno.js.

JSCL is and will be a subset of Common Lisp. Of course it is far from complete, but it supports partially most common special operators, functions and macros. In particular:

• Multiple values

• Explicit control transfers tagbody and go

• Static and dynamic non local exit catch, throw; block, return-from.

• Lexical and special variables. However, declare expressions are missing, but you can proclaim special variables.

• Optional and keyword arguments

• SETF places

• Packages

• The LOOP macro

• CLOS

• The format function

• Others

The compiler is very verbose, some simple optimizations or minification could help to deal with it.

Feel free to hack it yourself