We're so glad you're thinking about contributing to a Trailhead Labs open source project! If you're unsure about anything, just ask -- or submit the issue or pull request anyway. The worst that can happen is you'll be politely asked to change something. We love all friendly contributions.
We encourage you to read this project's CONTRIBUTING policy (you are here), its LICENSE, and its README.
If you have any questions, just shoot us an email.
OuterSpatial Map Library uses JavaScript Semi-Standard Style.
The .csscomb.json file should be used to format CSS.