How do I know if a shop is an Online Store 2.0?

[ericute]

I've seen this question asked a couple of times:

• https://community.shopify.com/c/technical-q-a/how-do-i-know-if-i-am-using-shopify-2/m-p/1987839/thre...
• https://community.shopify.com/c/shopify-design/how-to-identify-shopify-online-2-0-theme-or-later/td-...

But, I don't see a definitive answer on how to identify if a Shop is a (or has been migrated to) Online Store 2.0 (https://shopify.dev/docs/themes/os20).

I'm planning to just mark it as Online Store 2.0 if the 404 file has a json extension (I.e. 404.json). Will that suffice?

[Dan-From-Ryviu]

• In Online Store > Themes > Edit code

• In Templates folder of your theme, all your files are .json then it means your theme is Shopify 2.0 OS theme

[ericute]

I'm trying to build an app using theme app extension and this validation will be done via code. Can this be done via an API call?

[ericute · Accepted solution]

Found the official document to verify theme support for App Blocks:  https://shopify.dev/docs/apps/online-store/verify-support#verify-support-for-app-blocks

I'm not sure if it is the same validation for App Embed Blocks.