• Refactored codebase for clarity: extracted the public type declarations into types.ts
• Decomposed the three largest sanitizer functions into focused helpers
• Removed duplicated defaults and dead branches, consolidated SAFE_FOR_TEMPLATES scrubbing into single shared path
• Improved per-node performance by hoisting the mXSS probe regexes and testing textContent before innerHTML
• Added a deterministic micro-benchmark harness (npm run bench) with a --compare mode
• Reduced CI cost by running the full three-engine browser suite once per PR
• Refreshed the demos/ folder so every demo runs again, and added a SVG-via-<img> demo
• Documented the bench and test:happydom scripts in the README
• Completed the Attack Classes & Bypass History wiki page
• Bumped several dependencies where possible