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HTML

              
                
              
            
!

CSS

              
                

/*
<!-- XXX -->
<link rel="stylesheet" 
  href="https://codepen.io/memetican/pen/vYQjzLm/e7b9dc532f9c872b346c70dab06a4755.css">
<script async 
  src="https://codepen.io/memetican/pen/vYQjzLm/e7b9dc532f9c872b346c70dab06a4755.js"
  ></script>

*/

              
            
!

JS

              
                // Haversine formula to calculate the distance between two points
function calculateDistance(lat1, lon1, lat2, lon2) {
  const R = 6371; // Radius of Earth in km
  const dLat = (lat2 - lat1) * Math.PI / 180;
  const dLon = (lon2 - lon1) * Math.PI / 180;
  const a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
            Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) *
            Math.sin(dLon / 2) * Math.sin(dLon / 2);
  const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
  return R * c;
}


// Function to calculate and store distance for each item
function calculateDistancesForItems(items, callback) {
  items.forEach(item => {
    const element = item.element; // Access the actual HTML element
    if (element instanceof HTMLElement) {
      const placeLat = parseFloat(element.getAttribute('data-latitude'));
      const placeLon = parseFloat(element.getAttribute('data-longitude'));

      if (!isNaN(placeLat) && !isNaN(placeLon)) {
        const distance = calculateDistance(userLat, userLon, placeLat, placeLon);
        element.setAttribute('data-distance', distance); // Store numeric distance for sorting

        item.props.distance.values.clear();
        item.props.distance.values.add(`"${distance}"`);  
        
        // Display the distance without "km" or extra characters
        const distanceElement = element.querySelector('[calc-distance]');
        if (distanceElement) {
          distanceElement.innerText = distance.toFixed(2) + " km distance"; // Only display the numeric value
        }
      }
    }
  });

  // Callback to proceed with sorting after distances are calculated
  if (callback) {
    callback();
  }
}

async function init() {
  
  // Determine user location
  window.userLat = 0; // default
  window.userLon = 0; // default

  await getUserLocation();

  console.log(window.userLat, window.userLon);



  window.fsAttributes = window.fsAttributes || [];

  // Initialize CMS Load to ensure items are loaded before calculating distances
  window.fsAttributes.push([
    'cmsload',
    async (listInstances: CMSList[]) => {
      const [listInstance] = listInstances;

      console.log("cmsload callback")

      // Run the distance calculation for items already rendered on the first page
      const renderedItems = listInstance.items;
      calculateDistancesForItems(renderedItems, () => {
        
        console.log(renderedItems);
        
        // Sort items after distance calculation
        console.log("re-initializing cmssort"); 
        window.fsAttributes.cmssort.init();
  
      });

    },
  ]);

}
  
async function getUserLocation() {
  if (navigator.geolocation) {
    try {
      // getCurrentPosition is async, we need it promise-based 
      const position = await new Promise((resolve, reject) => {
        navigator.geolocation.getCurrentPosition(resolve, reject);
      });

      window.userLat = position.coords.latitude;
      window.userLon = position.coords.longitude;
      
      // Find elements with custom attributes and update their text content
      const latElement = document.querySelector('[info="latitude"]');
      const lonElement = document.querySelector('[info="longitude"]');

      if (latElement) {
        latElement.textContent = window.userLat.toFixed(6); // Display the latitude
      }

      if (lonElement) {
        lonElement.textContent = window.userLon.toFixed(6); // Display the longitude
      }
      
      // Now the values are available and ready to use
      console.log(`Latitude: ${userLat}, Longitude: ${userLon}`);
    } catch (error) {
      alert(`Error: ${error.message}`);
    }
  } else {
    alert("Geolocation is not supported by this browser.");
  }
}


init(); 

              
            
!
999px

Console