What it does
One Page Checkout, in practice.
The [ambikly_one_page_checkout] shortcode renders an empty shell that a small script fills with the cart, contact details, shipping address, shipping methods, coupon field and payment method on one page. Every action calls the core ambikly/v1 routes: cart, cart/items, cart/coupons, cart/shipping, checkout/options, checkout/shipping and checkout. Changing the country, postcode or state re-quotes shipping, a single quoted method is selected automatically, and Place order is a real form submit so browser required-field checks run before any request is sent. Items that became unavailable are flagged and block submission until removed. Fewer steps means fewer places for a customer to drop out.