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

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome Full support 70Edge Full support 79Firefox No support NoIE No support NoOpera Full support 57Safari No support NoWebView Android No support NoChrome Android Full support 70Firefox Android No support NoOpera Android Full support 49Safari iOS No support NoSamsung Internet Android Full support Yes


Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.