ol3之加载geojson数据

let data  = {
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [125.6, 10.1]
},
"properties": {
"name": "Dinagat Islands"
}
}

var vectorSource = new ol.source.Vector({
features: (new ol.format.GeoJSON()).readFeatures(data)
});
var vectorLayer = new ol.layer.Vector({
source: vectorSource,
style: ‘‘
});
this.map.addLayer(vectorLayer)

let extent = vectorSource.getExtent()
this.view.fit(extent)