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@broofa
broofa / checkForUndefinedCSSClasses.js
Last active June 22, 2025 08:19
ES module for detecting undefined CSS classes (uses mutation observer to monitor DOM changes). `console.warn()`s undefined classes.
/**
* Sets up a DOM MutationObserver that watches for elements using undefined CSS
* class names. Performance should be pretty good, but it's probably best to
* avoid using this in production.
*
* Usage:
*
* import cssCheck from './checkForUndefinedCSSClasses.js'
*
* // Call before DOM renders (e.g. in <HEAD> or prior to React.render())
@hofmannsven
hofmannsven / README.md
Last active October 2, 2025 20:17
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