Hi there! 👋🏻

I've been writing JavaScript since 2000, and contributing to open source since 2007. My open source work has often focused on projects that improve or make advanced use of regular expressions, and help others learn and get the most from them.

I've created and maintain numerous open source projects (collectively downloaded more than 300 million times per year on npm) including:

• Regex+, which advances the state of the art for readable and maintainable native JavaScript regexes.
• oniguruma-to-es and oniguruma-parser, used by Shiki and others to improve syntax highlighting performance and reduce bundle sizes across the web.
• XRegExp, which was indispensable for heavy regex users in its time (especially during the ES3 to ES2017 era), and was influential on regex improvements in later ECMAScript standards (many of its best features have been incorporated into modern JavaScript).
• RegexPal, which has been retired, but was the first web-based regex tester with regex syntax highlighting and real-time matching. It helped inspire later tools like RegExr and regex101.
• Awesome Regex, parseUri, dateFormat, emoji-regex-xs, regex-colorizer, and others.

I've also coauthored two editions of O'Reilly Media's Regular Expressions Cookbook (translated into seven languages) and High Performance JavaScript.

I'd love to spend more time contributing to open source, with your support!