feature-policy/resources/feature-policy-payment.html

<script>
'use strict';

window.onload = function() {
  var supportedInstruments = [ { supportedMethods: [ 'visa' ] } ];
  var details = {
      total: { label: 'Test', amount: { currency: 'USD', value: '5.00' } }
  };
  try {
    new PaymentRequest(supportedInstruments, details);
    parent.postMessage({ enabled: true }, '*');
  } catch (e) {
    parent.postMessage({ enabled: false }, '*');
  }
}
</script>