This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The instrumentKey read-only property of the PaymentRequestEvent interface returns a PaymentInstrument object reflecting the payment instrument selected by the user or an empty string if the user has not registered or chosen a payment instrument.


var instrumentKey = paymentRequestEvent.instrumentKey


A PaymentInstrument object.


Specification Status Comment
Payment Handler API
The definition of 'instrumentKey' in that specification.
Working Draft Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support601 ? ? ? No ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No601 ? ? No ? No

1. From version 60: this feature is behind the #service-worker-payment-apps preference (needs to be set to Enabled). To change preferences in Chrome, visit chrome://flags.

Document Tags and Contributors

Contributors to this page: jpmedley
Last updated by: jpmedley,