nz-regions.js

var regionLayer = L.geoJson(regions, {
  style: {
    color: '#550055',
    weight: 1,
    opacity: 1,
    fillOpacity: 0       
  },
  onEachFeature: function(feature, layer) {
    layer.bindPopup('<strong>' + feature.properties.REGC_NAME + '</strong>');
    layer.on({
      mouseover: function(e) {
        e.target.setStyle({
          weight: 3
        });      
      },
      mouseout: function(e) {
        e.target.setStyle({
          weight: 1
        });        
      }
    });
  }
});