PaymentRequest.shippingAddress

The shippingAddress read-only property of the PaymentRequest interface returns the shipping address provided by the user. It is null by default.

var paymentAddress = PaymentRequest.shippingAddress;

Generally, the user agent will fill the shippingAddress property value. You can trigger this by setting PaymentOptions.requestShipping to true when calling the PaymentRequest constructor.

In the example below, the cost of shipping varies by geography. When the PaymentRequest.onshippingaddresschange is called, updateDetails() is called to update the details of the PaymentRequest, using shippingAddress to set the correct shipping cost.

// Initialization of PaymentRequest arguments are excerpted for the sake of
//   brevity.
var payment = new PaymentRequest(supportedInstruments, details, options);

payment.addEventListener('shippingaddresschange', function(evt) {
  evt.updateWith(new Promise(function(resolve) {
    updateDetails(details, request.shippingAddress, resolve);
  }));
});

payment.show().then(function(paymentResponse) {
    // Processing of paymentResponse exerpted for brevity.
}).catch(function(err) {
    console.error("Uh oh, something bad happened", err.message);
});

function updateDetails(details, shippingAddress, resolve) {
  if (shippingAddress.country === 'US') {
    var shippingOption = {
      id: '',
      label: '',
      amount: {currency: 'USD', value: '0.00'},
      selected: true
    };
    if (shippingAddress.region === 'MO') {
      shippingOption.id = 'mo';
      shippingOption.label = 'Free shipping in Missouri';
      details.total.amount.value = '55.00';
    } else {
      shippingOption.id = 'us';
      shippingOption.label = 'Standard shipping in US';
      shippingOption.amount.value = '5.00';
      details.total.amount.value = '60.00';
    }
    details.displayItems.splice(2, 1, shippingOption);
    details.shippingOptions = [shippingOption];
  } else {
    delete details.shippingOptions;
  }
  resolve(details);
}