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

The id read-only attribute of the PaymentRequest interface returns a unique identifier for a particular PaymentRequest instance.

When constructing an instance of the PaymentRequest, you are able to supply an custom id via  PaymentDetailsInit dictionary's id member. If none is provided, the browser automatically sets the id value to a UUID.


This example shows how to give a PaymentRequest instance a custom id.

const details = {
  id: "super-store-order-123-12312",
  total: {
    label: "Total due",
    amount: { currency: "USD", value: "65.00" },
const request = new PaymentRequest(methodData, details);
console.log(; // super-store-order-123-12312

The id is then also available in the PaymentResponse returned from the show() method, but under the requestId attribute.

const response = await;
console.log(response.requestId ===;

// And in serialized form too
const json = response.toJSON(); 


var id =


A DOMString.


Specification Status Comment
Payment Request API
The definition of 'id' in that specification.
Candidate Recommendation Initial definition.

Browser Compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support ? ? ? ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? ? ? ? ? ? ?

Document Tags and Contributors

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