PayPal Checkout (Orders v2) auto fill billing address

Question

I am creating a PayPal Checkout button, is there any way to auto fill the billing address in the Debit or Credit Card form?

see screenshot

My current code:

  paypal.Buttons({
    createOrder: function(data, actions) {
                  return actions.order.create({
            purchase_units: [{
          amount: {
            value: '1'
          }
    }],
      });
    }
  }).render('#paypal-button-container');

Answer 1

The way to do this used to involve a payer object, and still works:

paypal.Buttons({
  enableStandardCardFields: true,
  createOrder: function(data, actions) {
    return actions.order.create({
      intent: 'CAPTURE',
      payer: {
        name: {
          given_name: "Firstname",
          surname: "Lastname"
        },
        address: {
          address_line_1: '123 ABC Street',
          address_line_2: 'Apt 2',
          admin_area_2: 'San Jose',
          admin_area_1: 'CA',
          postal_code: '95121',
          country_code: 'US'
        },
        email_address: "customer@domain.com",
        phone: {
          phone_type: "MOBILE",
          phone_number: {
            national_number: "14082508100"
          }
        }
      },
      purchase_units: [
        {
          amount: {
            value: '15.00',
            currency_code: 'USD'
          },
          shipping: {
            address: {
              address_line_1: '2211 N First Street',
              address_line_2: 'Building 17',
              admin_area_2: 'San Jose',
              admin_area_1: 'CA',
              postal_code: '95131',
              country_code: 'US'
            }
          },
        }
      ]
    });
  }
}).render("body");

That payer parameter of the v2/checkout/orders API has been deprecated recently, though; seems the replacements will be in payment_source.paypal