Contributing

Indent 2 spaces
Always use single quotes
Use ASI (no semicolons unless needed)
Maximum line length is 80 characters
Write tests
Code must pass npm test

Whitespace

Space after if while for etc. Key rule: if it's a function call then no space, if it is a keyword then use a space
Space after function
No space for function declarations or named functions: function foo() { }

Misc Styles

One var per line, and try to declare them at the top of the function
// for comments