Use React in app block theme extension

Retired Boards Appdev Store Design
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Topic summary

Developers are exploring how to use React within Shopify theme app extensions, which traditionally rely on Liquid templates and vanilla JavaScript. The core challenge is that app blocks don’t natively support React frameworks.

Established Solution:

  • Bundle React apps into a single JavaScript file using tools like Webpack or Vite
  • Reference the bundled file (e.g., bundle.js) in the app-block’s Liquid schema under the javascript property
  • Create React source code in a separate folder outside the extension directory
  • Configure the build tool to output the compiled bundle into the extension’s /assets folder

Common Implementation Issues:

  • React requires a DOM element to mount to, which must be defined in the .liquid file
  • Asset management (images, CSS) becomes complicated when transitioning from Liquid to React
  • Developers struggle with proper folder structure and build configuration
  • Size limits and Shopify’s restrictions on extension folder contents create constraints

Resources & Alternatives:

  • A community member shared a template repository demonstrating React + Tailwind CSS setup
  • Settings can be passed from Liquid schema to React via data attributes on the root div
  • At least one developer abandoned this approach entirely, opting to embed their React app as an externally-hosted iframe

Status: The discussion remains open with ongoing questions about asset handling and build configuration. Multiple participants note that Shopify’s documentation lacks comprehensive guidance on React integration.

Summarized with AI on October 25. AI used: claude-sonnet-4-5-20250929.
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I’m not totally clear on what you’re asking, but it sounds like you’ll want to recreate the form you created for the admin in the app block to get it to show up. Beyond that, familiarize yourself with the theme-app extension framework and the rest of the documentation surrounding apps, as well as the various API’s you’ll have access too to make your block work.

Also keep in mind that Shopify has a Cash On Demand option available as an option in their checkout. You may also want to familiarize yourself with Shopify Functions and Checkout Extensions. This may be better suited to what you are trying to do.