hack-js is a JavaScript implementation of the computer architecture from the book "Elements of Computing Systems", which accompanies the NAND to Tetris course.
hack-js uses a web browser to run .hack files containing machine code instructions. An HTML5 canvas is used to display operations that draw to the screen, and relevant keyboard events are forwarded to the Hack program.
hack-js is a work in progress, and was inspired by the London Computation Club meet-up.
The only dependency is Node.js. No third-party libraries required.
Use the bin/run binary to run a given Hack file. For example:
$ bin/run Pong.hack
Running Pong.hack at http://0.0.0.0:4225
This will launch a local web server on port 4225 ("HACK" on a phone keypad). Navigating to http://0.0.0.0:4225 in a reasonably recent browser will run the Hack program and display its output in a 512x256 HTML5 canvas element.