js-xss

Benchmarks in the README show 22.53 MB/s throughput, significantly faster than alternatives like validator@0.3.7 at 6.9 MB/s, making it ideal for high-traffic applications.

Provides onTag, onTagAttr, onIgnoreTag, and other handlers, allowing fine-grained control over sanitization logic, as demonstrated in examples for allowing data-* attributes or custom tags.

Works in Node.js and browser environments with AMD, shim, and command-line tool support, enabling usage in diverse scenarios from servers to client-side rendering.

Optional CSS sanitization via the cssfilter module allows safe handling of style attributes with configurable whitelists, adding an extra layer of security.