/Web APIs

PaymentRequestEvent: respondWith() method

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

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





A Promise that resolves with a PaymentHandlerResponse object.

Return value

A PaymentHandlerResponse object. This contains the following properties:


The payment method identifier for the payment method that the user selected to fulfill the transaction.


A JSON-serializable object that provides a payment method-specific message used by the merchant to process the transaction and determine a successful fund transfer. See 7.1.2 details attribute for more details.


self.addEventListener('paymentrequest', async e => {// Retain a promise for future resolution
  // Polyfill for PromiseResolver at link below.
  resolver = new PromiseResolver();

  // Pass a promise that resolves when payment is done.
  // Open the checkout page.
  try {
    // Open the window and preserve the client
    client = await e.openWindow(checkoutURL);
    if (!client) {
      // Reject if the window fails to open
      throw 'Failed to open window';
  } catch (err) {
    // Reject the promise on failure

See Open the payment handler window to display the web-based payment app frontend for more details about how this would be used.


Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
respondWith 70 79 No No 57 No No 70 No 49 No 10.0

See also

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