new ol.layer.Tile({
     source:new ol.source.VectorTile({
       format: new ol.format.MVT(),
       url:"rectangle-1.0.0.pbf"
     })
   })

style: function(feature, res) {
           return new ol.style.Style({
               stroke: new ol.style.Stroke({
                   width: 2,
                   color: 'rgba(0, 102, 204)'
               })
           })
       },

new ol.layer.VectorTile({
     source:new ol.source.VectorTile({
       format: new ol.format.MVT(),
       url:"rectangle-1.0.0.pbf"
     })
   })