Jon Kuperman

Bloomberg

Building developer tools and infrastructure for the Bloomberg financial terminal, Jon is a TC39 delegate, co-convener of the source map specification and member of the JavaScript Signals working group.

Jon Kuperman's Courses

Website Accessibility, v3

Jon Kuperman

Bloomberg

Learn how to audit & fix website accessibility issues. Learn keyboard accessibility, focus control & ARIA roles to make websites accessible to screen readers.

2 hours, 19 minutes CC

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Mastering Chrome Developer Tools, v4

Jon Kuperman

Bloomberg

Inspect, debug, and audit web apps faster with professional Chrome DevTools skills! Prototype UIs live in-browser and ensure your apps are high-performing and following the latest performance, SEO, and accessibility best practices.

3 hours, 44 minutes CC

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What They're Saying

Awesome content! It really opens my mind to A11y and how easy it can be to implement it.

Vitor Coutinho Fernandes

Just finished the Website Accessibility, v3 course on Frontend Masters by Jon Kuperman. Honestly, I had heard of web accessibility before, but never truly explored it. This course opened my eyes to the real impact of semantic HTML, ARIA roles, focus management, and proper contrast. Huge thanks to Jon for sharing not just technical skills but also real-world experiences that made everything more relatable. Highly recommended for any frontend developer!

Md.Sajib Ahmed

Quick and rich course about website accessibility that fills our toolbox from the beginning. With small details that are easy to implement in our development process without increasing too much the overall time, a win-win. Jon Kuperman delivered a five star course once again.

Tiago Couto

The course was foundational and easy to follow. While it focused on Vanilla JavaScript, I’ll definitely be exploring more techniques for mastering Chrome Developer Tools—especially those that pair well with React development. It was a great starting point, and I believe it takes time and practice to grow more comfortable with these tools and apply them effectively across different frameworks.