Proximity Search with Sprig

Sprig (opens new window) is a reactive component framework for Craft, which makes it amazingly easy to create dynamic components using Twig. When used together with the Google Maps plugin, it's possible to have a fully featured map populated by the results of a comprehensive proximity search.

Simply follow the instructions below to add a Sprig-powered proximity search to your site. While each implementation will be unique, you can use the code provided below to get started.

# What it Looks Like

Several small pieces play a cooperative role in handling the proximity search...

Annotated screenshot of Google Maps being used with Sprig
  1. The search input is a simple text field for capturing the proximity search target.
  2. Optional search filters can refine the results (eg: range).
  3. An ordinary submit button will trigger the search.
  4. A list of search results is displayed besides the map.
  5. The dynamic map will show markers of the search results.

# How it Works

# 1. Download the proximity-search.twig file

Download this file, and place it somewhere in your templates folder. It's a common practice to put Sprig components (opens new window) into a _components folder, but that is not required.

This file belongs to you now

Once you have copied the proximity-search.twig file locally, you are free to make any further adjustments as you deem necessary.

# 2. Add the following Twig snippet

Now that you have a copy of the proximity-search component, here's how to use it in a template...

{# Dynamically inject Sprig component #}
{{ sprig('_components/proximity-search') }}

{# Load required Sprig scripts #}
{{ sprig.script }}

# Additional Information

# Map IDs must be identical

It is important that the map ID in the googleMaps.init method matches the map ID when it was created. If they don't match, the map can't be properly reloaded when Sprig updates the component.

{# When the map is created #}
{% set mapOptions = {
    'id': 'my-sprig-map'
} %}

{# When the map is reloaded by Sprig #}
{% if sprig.isRequest %}
    <script>
        googleMaps.init('my-sprig-map');
    </script>
{% endif %}

Alternatively, if you call googleMaps.init() with no parameters, all maps will be initialized.

# Optional callback on googleMaps.init

The init method also allows for an optional callback method, if needed:

{% if sprig.isRequest %}
    <script>
        googleMaps.init('my-sprig-map', function () {
            console.log("The map has finished loading!");
        });
    </script>
{% endif %}

# Autocomplete target input

It's possible to use Google Places Autocomplete to provide an enhanced target input field. This gives users a dynamic list of possible matches while they type their search target. The user can then simply select the matching location from a list of potential matches.

Enabling the Places API

For more information, see the instructions for using the Places API in a front-end form.

While a proximity search is not identical to a front-end form, the Autocomplete implementation will be very similar for both cases.

If you choose to enhance your Sprig form in this way, consider using the latitude & longitude (which can be passed via hidden fields) as the target of your proximity search.

  1. Get coordinates from Places API results.
  2. Store the latitude and longitude via hidden input fields.
  3. Use those coordinates as the target of your proximity search.

This saves the effort of querying Google (again) based on a text string. Since we already know the coordinates, we can just use them directly. Using known coordinates will improve search accuracy and reduce the number of calls to the Google API.