index.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
<script src='https://api.tiles.mapbox.com/mapbox.js/v1.6.4/mapbox.js'></script>
  <link href='https://api.tiles.mapbox.com/mapbox.js/v1.6.4/mapbox.css' rel='stylesheet' />

</head>
  <body>
    <div id="map" style="width: 100%; height: 600px; border: 1px solid #ccc;"></div>

// go through each polygon in layer, style based on property in parking=
 // example from: https://leafletjs.com/examples/geojson.html

// featLayer.loadURL('dtparking.geojson').addTo(mizzap);

featLayer.loadURL('dtparking.geojson');

featLayer.on('ready', function() { 
          featLayer.eachLayer(function(polygon) { 
          polygon.setStyle( {fill: '#bada55'}); 
          }); 
  });        
               
 // https://www.mapbox.com/mapbox.js/example/v1.0.0/choropleth/
      //     function getMyStyle(feature) {
      //       return {
      //         weight: 4, 
      //         fillOpacity: 0.08, 
      //         // fillColor: getColor(feature.properties.parking)
      //         //   color: getColor(feature.properties.density) * 0.4; 
      //       };
      //     }                                              
      // });

//function getColor(thevalue){
            //      console.log(thevalue);
                    //return {
                    
                    // thevalue = "multi-storey" ? '#ff0000': 
                    // thevalue = "surface" ?  "#AD3535":
                    // thevalue == "underground" ?  "#FF1717":
                    // ;
                 //   }

// mizzap.legendControl.addLegend(document.getElementById('legend').innerHTML);

</script>

</body>
</html>

https://api.tiles.mapbox.com/mapbox.js/v1.6.4/mapbox.js