PayPal Smart Payments Buttons customizations

paypal.js

paypal.Buttons({
  locale: 'en_US',
  style: {
  layout: 'horizontal',
  color: 'gold',
  label: 'checkout',
  shape: 'pill',
  size: 'responsive',
  tagline: false
  },
  createOrder: function(data, actions) {
    return actions.order.create({
      intent: 'CAPTURE',
      purchase_units: [{
        reference_id: AmplifyStore.state.user.attributes.sub, //256 characters
        description: 'Songxy Audio Mastering', //this shows up in checkout description 127 characters
        custom_id: AmplifyStore.state.federatedCredentials.identityId, //127 characters
        soft_descriptor: 'SONGXY', //descriptor on the customer's credit card statement 22 characters
        "items": [{
          name: "Track 1",
          description: "Mastering",
          quantity: "5",
          unit_amount: { 
              value: '5.00', 
              currency_code: 'USD',
          },
          tax: { 
              value: '5.00', 
              currency_code: 'USD',
          },
          sku: "AUD101", //127 characters
          category: 'DIGITAL_GOODS',
          },
          {
          name: "Track 2",
          description: "Mastering",
          quantity: "5",
          unit_amount: { 
              value: '5.00', 
              currency_code: 'USD',
          },
          tax: { 
              value: '5.00', 
              currency_code: 'USD',
          },
          sku: "AUD101", //127 characters
          category: 'DIGITAL_GOODS',
          }
        ],
        amount: {
          value: '100.00',
          currency_code: 'USD',
          breakdown: {
            tax_total: {
                value: '50.00',
                currency_code: 'USD',
            },
            item_total: {
                value: '50.00',
                currency_code: 'USD',
            }
          }
        }
      }]
    })
  }
}).render('#paypal-button-container')