Does One page checkout and layouts refresh the stock, visibility, and price of product variations as items are added to the cart without reloading the page?Can I insert PHP code into the shortcode that inserts an array of the current products with catalog visibility set to \”visible\”?Can the array of the current products be updated without reloading the page?Can I hide and display the check out sections like cart, shipping, payment, and confirmation in sequence with javascript click events?Does it work with the Braintree plugin for paypal payment without page refresh?Does it work with paypal payment without redirection or page reloading?