W3C Payment API changes in Chrome 75

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Rouslan Solomakhin

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Jun 6, 2019, 10:08:49 AM6/6/19

to payment...@chromium.org

The following changes are live in Chrome 75.

Stable: today

New features enabled by default:

Allow PaymentRequest.show() to take optional detailsPromise

Allow PaymentRequest.show() to take optional detailsPromise

This Payment Request API feature allows merchants to show the payment sheet before the final total is known. The merchant has 10 seconds to resolve the detailsPromise before a timeout. This feature is intended for a quick server-side roundtrip.

Merchant example:

// Not implemented in Chrome 74 and older.

// There’s no way to feature-detect this, so check a few

// older versions of Chrome that you’re seeing hit your servers.

if (/Chrome\/7[0-4]/g.exec(navigator.userAgent) !== null) {

return;

}

// Supported in Chrome 75+.

request.show(new Promise(function(resolveDetailsPromise, rejectDetailsPromise) {
// Find out the exact total amount and call resolveDetailsPromise(details).
// Use a 3 second timeout as an example.
window.setTimeout(function() {
resolveDetailsPromise(details);
}, 3000); // 3 seconds.
}))
.then(handleResponse)
.catch(handleError);