It's easy!
To get started with setting up your development environment, head over to Getting Started.
Charactersheet has it's own style guide for Javascript, HTML, and CSS. If you use an editor supported by Editor Config then everything should work automatically. Otherwise the conventions are listed below.
indent_size = space
indent_size = 4
indent_style = space
indent_size = 2
As this is Javascript, the code style guide is as follows.
Casing: camelCase with the first letter lowercase unless the value is a Knockout ViewModel or other psudo-class object definition.
Quoting: In all Javascript, use of single quotes over double quotes is preferred.
File Naming: All files with multi-word names should be seperated with underscores (i.e. node_modules or ability_scores); hyphens are strongly discouraged.
Please look through the issues list and feel free to ask questions! A lot of the issues can appear terse, but its probably because they're 'notes to our future-selves'. If a feature looks interesting to you, but you're not clear on the details, ask away!
Knockout.js for the front end. jQuery for the async networking. Bootstrap for the styling. Mocha for unittesting Karma, Grunt, and Istanbul for measuring code converage.