javascript

function onBuyClicked() {
  var supportedInstruments = [{
    supportedMethods: ['amex', 'diners', 'discover', 'jcb', 'mastercard',
        'unionpay', 'visa']
  }];

  var details = {
    total: {label: 'Donation', amount: {currency: 'USD', value: '55.00'}},
    displayItems: [
      {
        label: 'Original donation amount',
        amount: {currency: 'USD', value: '65.00'}
      },
      {
        label: 'Friends and family discount',
        amount: {currency: 'USD', value: '-10.00'}
      }
    ]
  };

  new PaymentRequest(supportedInstruments, details) // eslint-disable-line no-undef
      .show()
      .then(function(instrumentResponse) {
        sendPaymentToServer(instrumentResponse);
      })
      .catch(function(err) {
        ChromeSamples.setStatus(err);
      });
}