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PaymentRequestEvent.respondWith

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

The respondWith property of the PaymentRequestEvent interface prevents the default event handling and allows you to provide a Promise for a PaymentResponse object yourself.

paymentRequestEvent.respondWith(
  // Promise that resolves with a PaymentResponse.
)

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

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	59 Disabled 59 Disabled Disabled From version 59: this feature is behind the `#service-worker-payment-apps` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	?	?	?	No	?

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	No	59 Disabled 59 Disabled Disabled From version 59: this feature is behind the `#service-worker-payment-apps` preference (needs to be set to `Enabled`). To change preferences in Chrome, visit chrome://flags.	?	?	No	?	7.0

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https://developer.mozilla.org/en-US/docs/Web/API/PaymentRequestEvent/respondWith