The read-only methodDetails
property of the PaymentMethodChangeEvent
interface is an object containing any data the payment handler may provide to describe the change the user has made to their payment method. The value is null
if no details are available.
An object containing any data needed to describe the changes made to the payment method. The contents vary depending on the actual payment method chosen, so you will need to refer to the methodName
property first, then interpret the methodDetails
after that.
The default value is null
, indicating that no additional details are available.
This example uses the paymentmethodchange
event to watch for changes to the payment method selected for Apple Pay, in order to compute a discount if the user chooses to use a Visa card as their payment method.
request.onpaymentmethodchange = (ev) => {
const { type: cardType } = ev.methodDetails;
const newStuff = {};
if (ev.methodName === "https://apple.com/apple-pay") {
switch (cardType) {
case "visa": {
const discount = calculateDiscount(ev.methodDetails);
Object.assign(newStuff, discount);
break;
}
}
}
ev.updateWith(newStuff);
};
const response = await request.show();
Note that the methodDetails
property is being used by the calculateDiscount()
function to compute any payment discount, then updateWith()
is called to update the event with the computed update.