
The browser APIs you're shipping libraries to replace with Kilian Valkhof
From PodRocket by LogRocket
April 2, 2026 · 38 min
About this episode
Kilian Valkhof discusses how the JavaScript Intl API can replace popular libraries like date-fns and Moment.js for date and currency formatting.
Most developers reach for date-fns or Moment.js without realizing the browser already ships a powerful string formatting library called the JavaScript Intl API. Killian Valkhof, creator of Polypane, walks through how locale-aware date formatting, currency formatting, the Segmenter API, and the Collator API can replace heavy npm dependencies, with support for over 7,000 locales baked right into every evergreen browser since 2017. Links Resources INTL: The best browser API you’re not using | Kilian Valkhof: https://www.youtube.com/watch?v=mhzJ1UFlRjw We want to hear from you! How did you find us? Did you see us on Twitter? In a newsletter? Or maybe we were recommended by a friend? Fill out our listener survey ! https://t.co/oKVAEXipxu Let us know by sending an email to our producer, Elizabeth, at elizabeth.becz@logrocket.com , or tweet at us at PodRocketPod . Check out our newsletter ! https://blog.logrocket.com/the-replay-newsletter/ Follow us. Get free stickers. Follow us on Apple Podcasts, fill out this form , and we’ll send you free PodRocket stickers! What does LogRocket do? LogRocket provides AI-first session replay and analytics that surfaces the UX and technical…
People in this episode
Guest: Kilian Valkhof
Topics covered
- browser APIs
- Intl API
- date formatting
- currency formatting
- npm dependencies
- internationalization
Keywords
- Intl API
- date formatting
- currency formatting
- npm dependencies
- internationalization
- browser APIs
- locale-aware
Mentioned in this episode
Organizations: LogRocket, Polypane
Products: date-fns, Moment.js, JavaScript Intl API
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