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@kdzwinel
kdzwinel / main.js
Last active January 16, 2025 20:26
List all undefined CSS classes
/*
This script attempts to identify all CSS classes mentioned in HTML but not defined in the stylesheets.
In order to use it, just run it in the DevTools console (or add it to DevTools Snippets and run it from there).
Note that this script requires browser to support `fetch` and some ES6 features (fat arrow, Promises, Array.from, Set). You can transpile it to ES5 here: https://babeljs.io/repl/ .
Known limitations:
- it won't be able to take into account some external stylesheets (if CORS isn't set up)
- it will produce false negatives for classes that are mentioned in the comments.

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@staltz
staltz / introrx.md
Last active April 21, 2025 04:15
The introduction to Reactive Programming you've been missing