We have Magento 2.1.0 website. We would like to make following implementation.
1. Show popup and validate zip code when press “ADD TO CART” button
2. If the zip code matched with our database, proceed shopping
3. Otherwise show message, Oops! Now we are not delivering in your area.
Our website name www.indbazaar.in. For functionality reference, Please visit. [url removed, login to view] and try to add a product. Please find attachment for detail.