Unable to properly pass parameters to the checkout to set locale and prefilled shipping address

[adamatronix]

I don't know if it's related to this: https://community.shopify.com/c/shopify-design/updated-all-merchants-now-have-the-option-to-choose-o..., the new one page checkout, but I am unable to pass parameters to the checkout properly. Mind you, I am doing it via the checkout.webUrl with the js-buy sdk. But even manually adding the params to the final checkout url it still doesnt work.

Essentially I have a zapiet store pickup third part app, and I want the checkout to reflect that the user chose pickup. I have made en-AU locale file for checkout to have wording that says "pickup" etc... so I want to set that checkout to be en-AU. Previously that has worked with my setup, but I notice the checkout.webUrl structure changes when actually loaded, and removes my params.

I have seen other stores implement it fine, with a similar setup as mine, zapiet + headless. For example they can do the following and not have any url changes: https://shop.parsonsnose.co.uk/14775166/checkouts/dbe10c7f7df5829f1617d6e7cad783b6?locale=en-CA&meth...

Wonder if anyone else has experience with js-buy checkout.webUrl and appending params.

[adamatronix]

 Like how is this store able to achieve this layout? Is it a Shopify plus feature?

[tobebuilds]

It's possible that they could be using checkout UI extensions, which are part of Checkout Extensibility, and therefore only available to Shopify Plus.

[ecbLR]

Dealing with a similar issue, though unrelated to layout. Our team relies on data sent from our non-Shopify store to checkout through URL params. The data gets stripped from the URL by Extensibility and we're looking for a new way to pass this information.