Hydrogen developer preview update: August 18, 2026

The Hydrogen developer preview adds new capabilities to the toolkit and extends the ways developers can build Shopify storefronts:

• Cart session attribution: Carts and Customer Account sessions stay in step, so signed-in shoppers reach checkout with their saved details instead of a guest flow.
• Cart attributes: Attach order-wide data like gift messages to the cart, and per-line data like engraving text to the lines it belongs to.
• Standard page view events: Hydrogen storefronts used to report only the first page load, leaving client-side navigations invisible to analytics and performance tooling. Every navigation now emits a page view, matching how liquid themes report events.
• Shop Pay button without shop-js: The button used to render blank until Shopify's hosted script loaded. Hydrogen now renders it directly, so it shows up styled and clickable right away, before any JavaScript runs.
• Local HTTPS for Customer Account development: Test login flows on a trusted local hostname, without a tunnel or hand-rolled certificates.
• Pluggable logging: Set how much Hydrogen logs and forward warnings and errors to your own observability tooling.

To get started, visit the Hydrogen developer preview documentation. For a detailed breakdown of this release, read the full release notes.