Shopify’s platform is the Web platform - Shopify

What this post added

This post introduces Remix as the recommended framework for building Shopify Admin apps, highlighting its performance benefits and alignment with web standards. It also details a significant update to App Bridge, a message-based protocol for iframe communication. The new App Bridge embraces modern web development technologies, including a CDN-hosted script for immediate fixes, the use of Custom Elements for enhanced integrations, and aims to make standard web development practices and libraries work seamlessly within iframes.