The Chrome DevTools codebase is around 150,000 lines of first-party JavaScript, with some parts being over ten-years old. As with any large, legacy codebase, there are a range of challenges to navigate, whether it be testing, code style and consistency, or simply understanding what the code is doing! This session steps through how we plan, implement, and maintain code migrations in Chrome's DevTools. Resources: Migrating to JavaScript module → https://goo.gle/devtools-js-modules Speakers: Paul Lewis, Tim van der Lippe, Jack Franklin Watch all Chrome Developer Summit sessions here → https://...