var sourceWFS = new ol.source.Vector({
    loader: function (extent) {
        $.ajax('..../geoserver/harry/ows?', {
            type: 'GET',
            data: {
                service: 'WFS',
                version: '1.1.0',
                request: 'GetFeature',
                typename: 'ABC',
                srsname: 'EPSG:3857',
                geometryField:'geometry',
                bbox: extent.join(',') + ',EPSG:3857'
            }

        }).done(function (response) {
            sourceWFS.addFeatures(formatWFS.readFeatures(response));
        });
    },
    strategy: ol.loadingstrategy.tile(ol.tilegrid.createXYZ()),
    strategy: ol.loadingstrategy.bbox,
    projection: 'EPSG:3857',

});
var layerWFS = new ol.layer.Vector({
    source: sourceWFS
});

var interaction;

var interactionSelectPointerMove = new ol.interaction.Select({
    condition: ol.events.condition.pointerMove
});

var interactionSelect = new ol.interaction.Select({


    style: new ol.style.Style({

            stroke: new ol.style.Stroke({
                color: 'rgba(255,0,0,1.0)',
                width: 1
            }),
            fill: new ol.style.Fill({
                color: 'rgba(255,0,0,0.5)'
            }),
            text: new ol.style.Text({
                text:("abcd")
            })


        })
});

var interactionSnap = new ol.interaction.Snap({
    source: layerWFS.getSource()
});