RESILIENT IMPORT MAPS - BETTER THEME DEVELOPMENT AND BEYOND (2025)

Summary from the TLDR Web Dev newsletter

Shopify discovered that JavaScript import maps were too fragile for real-world use. They would break if any modules loaded before them or if multiple maps existed on the same page. Working with web standards experts, Shopify developed and implemented a reconciliation mechanism that allows multiple import maps and modules to coexist safely, which shipped in Chrome 133 and Safari 18.4.