leizongmin/js-css-filter

`cssfilter` is a lightweight JavaScript library that sanitizes untrusted CSS by allowing only a predefined whitelist of properties and values (via exact matches, regular expressions, or custom functions). It protects developers—especially those building web applications, widgets, or CMS plugins—from CSS‑based XSS attacks and injection when rendering user‑generated styles. The library can be used both as a simple npm package and as a configurable filter for any HTML or CSS processing pipeline.