A collection of command-line tools for developing JS1K entries.
npm install -g js1k-harness
or
git clone git://github.com/af/js1k_harness.git
cd js1k-harness
npm link
Run the js1k executable. It provides three main subcommands:
Creates a boilerplate js file that you can add your entry's code to.
Starts a web server that serves your entry inside the js1k shim. This will automatically minify your code for you (with uglify-js), and show the current size of your entry in the browser. It reloads and minifies your javascript on every request, so you don't need to restart the server when your code changes (just refresh your browser).
Dumps your minified entry code to the console. You can submit this directly
to js1k, although you can probably still save a couple more bytes by editing
the output manually (removing var, etc).
Usage: js1k [options] [command]
Commands:
init Create a new js1k boilerplate javascript file
serve Serve your minified js in the js1k shim (on port 3001)
build Outputs a minified version of your javascript, suitable for submission
rules Open the js1k rules page
submit Open the js1k submission page
Options:
-h, --help output usage information
-V, --version output the version number
The byte savings you get from uglify-js can take you a long way, but beyond that there are a lot of clever manual tricks to slim your entry down even further. These articles have some great tips: