Serve Modern JS to Modern Browsers

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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

  1. Differential serving

Tools

  • Lighthouse: Legacy check

TL;DR

Use module/nomodule to serve modern JS to capable browsers.

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