How is a new address form popup implemented on the frontend checkout screen in the shipping section?

Development Checkout

dmitrii_fediuk (Dmitrii Fediuk) March 30, 2016, 5:53pm 2

See also:

How is a tooltip implemented for the «Phone Number» field on the «Shipping Address» popup on the frontend checkout page?
How is the «Add New Address» form implemented in a customer’s account?