Summary & Key Takeaways ​

• Vitest 5.0 focuses on speed, achieving up to 53% faster runs, and introduces a Trace View for debugging.
• Safari 27 now fully complies with the top-level await spec after a ground-up rewrite of its module loader.
• A deep dive explores how Turbopack chunks JavaScript, analyzing tradeoffs between requests and code size.
• Greptile offers an AI-powered tool to catch runtime bugs before PR merges, with sandbox execution and UI agents.
• jQuery 1.0 celebrates its 20th anniversary, reflecting on its impact on web development.
• deck.gl 9.4 extends its experimental WebGPU support.

Our Commentary ​

This weekly is packed! Vitest 5.0's speed improvements and debugging features are a big deal for the testing ecosystem. Safari finally fixing top-level await is a huge win for web platform consistency—that was a long-standing headache. And the Turbopack chunking deep dive is exactly the kind of performance analysis we need. It's a solid roundup of important web dev news.