The issue is unionResults seems not working.

ZhanGao

Try to develop buffer widget but the issue is unionResults seems not working

var params = new BufferParameters();

params.distances = [dom.byId("distance").value];

params.bufferSpatialReference = new esri.SpatialReference({ wkid: dom.byId("bufferSpatialReference").value });

params.outSpatialReference = this.map.spatialReference;

params.unit = GeometryService[dom.byId("unit").value];

params.unionResults = true;

The buffer cannot be dissolved.