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Checkout implementation guide | Checkout solution

Google Maps Platform is available for web (JS, TS), Android, and iOS, and also offers web services APIs for getting information about places, directions, and distances. The samples in this guide are written for one platform, but documentation links are provided for implementation on other platforms.

Quick Builder in the Google Cloud console lets you build address form autocompletion using an interactive UI that generates JavaScript code for you.

Online shopping and ordering have become a ubiquitous part of our lives. From same-day delivery services to booking a taxi or ordering dinner, customers have come to expect a frictionless checkout process.

In all of these applications, however, address entry for billing or shipping remains one stumbling block in the checkout flow that can be both time consuming and cumbersome. A frictionless checkout experience becomes even more important in the mobile world, where complex text entry on a small screen can be frustrating and another barrier for customer conversion.

This topic provides implementation guidance for helping your customers speed through their checkout process with predictive address entry.

The following diagram shows the core APIs involved in implementing Checkout (click to enlarge).

To implement Checkout, you must enable the following APIs in the Google Cloud console:

• Maps JavaScript API
• Places API
• Maps Static API

For more information about setup, see Getting started with Google Maps Platform.

Following are the tips and customizations we'll cover in this topic.

• check_circle_filled The check mark icon is a core practice.
• stars The star icon is an optional but recommended customization to enhance the solution.

check_circle_filled

Place Autocomplete can simplify address entry in your application, leading to higher conversion rates and a seamless experience for your customers. Autocomplete provides a single, quick entry field with "type-ahead" address prediction that can be used to automatically populate a billing or shipping address form.

By incorporating the Place Autocomplete in your online shopping cart, you can:

• Reduce address entry errors.
• Decrease the number of steps in the checkout process.
• Simplify the address entry experience on mobile or wearable devices.
• Significantly reduce keystrokes and total time required for a customer to place an order.

When the user selects the Autocomplete entry box and begins typing, a list of address predictions appear:

When the user selects an address from the list of predictions, you can use the response to verify the address and get the location. Your application can then populate the correct fields of the address entry form:

It only takes a couple of lines of JavaScript code to incorporate Place Autcomplete into your site.

The easiest way is to include the Maps JavaScript API (even if you are not displaying a map) in your site and specify the Places library as shown in the following example, which also executes the initialization function.

<script async
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&loading=async&libraries=places&callback=initAutocomplete&solution_channel=GMP_guides_checkout_v1_a">
</script>

Next, add a text box to your page, for user input:

<input id="autocomplete" placeholder="Enter your address"></input>

Finally, initialize the Autocomplete service and link it to the named text box:

function initAutocomplete() {
  // Create the autocomplete object, restricting the search predictions to
  // addresses in the US and Canada.
  autocomplete = new google.maps.places.Autocomplete(address1Field, {
    componentRestrictions: { country: ["us", "ca"] },
    fields: ["address_components", "geometry"],
    types: ["address"],
  });
  address1Field.focus();
  // When the user selects an address from the drop-down, populate the
  // address fields in the form.
  autocomplete.addListener("place_changed", fillInAddress);
}

In the previous example, the place_changed event listener is triggered when the user selects an address prediction, and the fillInAddress function is executed. The function, as shown in the following example, takes the selected response and extracts the address components to visualize within a form.

function fillInAddress() {
  // Get the place details from the autocomplete object.
  const place = autocomplete.getPlace();
  let address1 = "";
  let postcode = "";

  // Get each component of the address from the place details,
  // and then fill-in the corresponding field on the form.
  // place.address_components are google.maps.GeocoderAddressComponent objects
  // which are documented at http://goo.gle/3l5i5Mr
  for (const component of place.address_components as google.maps.GeocoderAddressComponent[]) {
    // @ts-ignore remove once typings fixed
    const componentType = component.types[0];

    switch (componentType) {
      case "street_number": {
        address1 = `${component.long_name} ${address1}`;
        break;
      }

      case "route": {
        address1 += component.short_name;
        break;
      }

      case "postal_code": {
        postcode = `${component.long_name}${postcode}`;
        break;
      }

      case "postal_code_suffix": {
        postcode = `${postcode}-${component.long_name}`;
        break;
      }

      case "locality":
        (document.querySelector("#locality") as HTMLInputElement).value =
          component.long_name;
        break;

      case "administrative_area_level_1": {
        (document.querySelector("#state") as HTMLInputElement).value =
          component.short_name;
        break;
      }

      case "country":
        (document.querySelector("#country") as HTMLInputElement).value =
          component.long_name;
        break;
    }
  }

  address1Field.value = address1;
  postalField.value = postcode;

  // After filling the form with address components from the Autocomplete
  // prediction, set cursor focus on the second address line to encourage
  // entry of subpremise information such as apartment, unit, or floor number.
  address2Field.focus();
}

function fillInAddress() {
  // Get the place details from the autocomplete object.
  const place = autocomplete.getPlace();
  let address1 = "";
  let postcode = "";

  // Get each component of the address from the place details,
  // and then fill-in the corresponding field on the form.
  // place.address_components are google.maps.GeocoderAddressComponent objects
  // which are documented at http://goo.gle/3l5i5Mr
  for (const component of place.address_components) {
    // @ts-ignore remove once typings fixed
    const componentType = component.types[0];

    switch (componentType) {
      case "street_number": {
        address1 = `${component.long_name} ${address1}`;
        break;
      }

      case "route": {
        address1 += component.short_name;
        break;
      }

      case "postal_code": {
        postcode = `${component.long_name}${postcode}`;
        break;
      }

      case "postal_code_suffix": {
        postcode = `${postcode}-${component.long_name}`;
        break;
      }
      case "locality":
        document.querySelector("#locality").value = component.long_name;
        break;
      case "administrative_area_level_1": {
        document.querySelector("#state").value = component.short_name;
        break;
      }
      case "country":
        document.querySelector("#country").value = component.long_name;
        break;
    }
  }

  address1Field.value = address1;
  postalField.value = postcode;
  // After filling the form with address components from the Autocomplete
  // prediction, set cursor focus on the second address line to encourage
  // entry of subpremise information such as apartment, unit, or floor number.
  address2Field.focus();
}

window.initAutocomplete = initAutocomplete;

Once you have this data, you can use it as the matched address for your user. From a few lines of code, you can make sure the customer enters the right address in a short amount of time.

See a working demo and full source code for populating an address entry form in this code sample.

Place Autocomplete has a number of options that allow it to be flexible with its implementation if you want to use more than just the widget. You can use a combination of services to get exactly what you need to match a location in the correct way.

• For an address form, set the types parameter to address to restrict the matches to full street addresses. Learn more about types supported in Place Autocomplete requests.
• Set the appropriate restrictions and biases if you don’t need to search worldwide. There are a number of parameters that can be used to bias or restrict any match to only specific regions.
  • Use bounds to set the rectangular bounds to constrain for an area, use strictBounds to make sure only addresses in those areas are returned.
  • Use componentRestrictions to restrict responses to a certain set of countries.
• Leave fields editable in case certain fields are missed from the match and allow customers to update the address if required. Since most addresses returned by Place Autocomplete do not contain subpremise numbers such as apartment, suite, or unit numbers, this example moves the focus to Address Line 2 to encourage the user to fill in that information if necessary.

check_circle_filled

After address entry, provide the user visual confirmation of the delivery or pickup location with a simple static map. This will offer the customer additional assurance that the address is correct, and it will reduce delivery/pickup failures. The static map can be shown on the page where they enter the address or even sent within the confirmation email when they have completed the transaction.

Both of these use cases can be accomplished with the Maps Static API, which adds an image version of the map to any image tag within a page or email.

You can use the Maps Static API using a web service call, which will create an image version of a map given the parameters you specify. Like the dynamic map, you can specify the type of map, use the same cloud-based styles and add markers to distinguish the location.

The following call shows a roadmap, with a size of 600x300px, centered on the Googleplex in Mountain View, CA at zoom level 13. It also specifies a blue delivery location marker and an online map style.

      https://maps.googleapis.com/maps/api/staticmap?center=37.422177,-122.084082
      &zoom=13
      &size=600x300
      &maptype=roadmap
      &markers=color:blue%7Clabel:S%7C37.422177,-122.084082
      &map_id=8f348d1b5a61d4bb
      &key=YOUR_API_KEY
      &solution_channel=GMP_guides_checkout_v1_a
      

This breaks down into the following sections:

This becomes the image as shown below:

For more information about Maps Static API options, see the documentation.

stars

You can further enhance your customer experience by taking advantage of some of the advanced features that Place Autocomplete has to offer. Here are some tips for improving your Autocomplete address entry box:

• stars Allow users to enter an address based on a business or point-of-interest name. The "type ahead" prediction service not only works for addresses, but you may also choose to allow business or landmark names to be entered. After a user enters a business name, it’s easy to retrieve the address with a call to Place Details. To allow for both addresses and establishment names to be entered, remove the types property from the Autocomplete definition.
• stars Customize the look and feel of the Place Autocomplete box to match your website style. You can also style the autocomplete widget to match the look and feel of your shopping cart. A set of CSS classes are available for you to customize. For more information on how to style your autocomplete box, read the documentation.
• stars If you want to build a custom UI. Building a custom UI instead of using the UI designed by Google, call the Place Autocomplete service programmatically to retrieve predictions for a given input. You can retrieve Place Autocomplete predictions programmatically in JavaScript, Android, and iOS as well as calling the web services API directly through Places API.

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