This page can be used to test Google Pay's pay.js in
live environment. No payment will be processed.
View source.
This page shows the reliance of isReadyToPay's
existingPaymentMethodRequired parameter on third-party
cookies. In a browser with third-party cookies disabled, the GPay button
below won't load, even if you are signed into Google and have a matching
payment method available.
To turn off third-party cookies in Chrome, visit chrome://settings/cookies and select "Block third-party cookies", then refresh this page.