We use Shopify's (https://www.shopify.com/?ref=lbit https://www.shopify.com/?ref=lbit) cart as a backend for this site: http://buylittlebits.com.au http://buyli

We use Shopify's (https://www.shopify.com/?ref=lbit https://www.shopify.com/?ref=lbit) cart as a backend for this site: http://buylittlebits.com.au http://buylittlebits.com.au The entire front end is Vanilla JS + Static HTML (compiled by Middleman) on S3. We upload the site to S3 with S3_Sync (https://github.com/fredjean/middleman-s3_sync https://github.com/fredjean/middleman-s3_sync). We've made a local JS cart and then send then checkout at Shopify. It's blindingly fast. This wouldn't be possible if it weren't for Shopify's cart links. Cart links allow you to craft a URL that contains quantities and product variant IDs. Documentation on cart links is available here: https://docs.shopify.com/manual/configuration/store-customization/page-specific/cart-page/cart-permalinks https://docs.shopify.com/manual/configuration/store-customiz... .