Quick Reference
Element Code: PE-018
Issue: Transpiled code to modern browsers
Impact: Larger bundles
Fix: Use module/nomodule
Detection: Bundle analysis
What Is This Issue?
Modern browsers can use ES6+.
Why This Matters
Modern JS is smaller.
How to Fix
- Differential serving
Tools
- Lighthouse: Legacy check
TL;DR
Use module/nomodule to serve modern JS to capable browsers.
Claude Vincent is a technical SEO consultant focused on crawlability, rendering, and AI-search visibility. He writes the field guides and case studies at SEO ProCheck, with a bias toward the durable, unglamorous work that decides whether search engines and AI answer engines can actually read and cite a site.
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