Here is my collection of scripts that can be copy-pasted into the chrome console, either in any domain (/any), or in specific domains to use website-specific APIs (overcoming CORS objections).
I made this both to practice building frontends from scratch in pure, vanilla JS, and also to hopefully build some useful tools that might help people directly as apps, and as vanilla JS code examples for how to achieve certain objectives. Enjoy!
The domain-specific apps can be used by the directory they're in, named with the reverse-order DNS directory naming system (recreation.gov -> gov/recreation/).
Below a given domain directory, all scripts directly in the directly or under [domain directory]/proj can be used in the given domain. All other directories represent subdomains.
Therefore, anything in or below gov/recreation/proj is either a standalone script, or a collection of scripts and documentation grouped into their own subdirectories, and are meant for the recreation.gov. Something in gov/recreation/parks or gov/recreation/parks/proj/ would be used in parks.recreation.gov, and so on.