ArcGIS API for JavaScript ^3.26

require([
  "esri/tasks/AreasAndLengthsParameters", "esri/tasks/GeometryService", ... 
], function(AreasAndLengthsParameters, GeometryService, ... ) {
  var geometryService = new GeometryService("https://utility.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer");
  var areasAndLengthParams = new AreasAndLengthsParameters();
  areasAndLengthParams.lengthUnit = GeometryService.UNIT_FOOT;
  areasAndLengthParams.areaUnit = GeometryService.UNIT_ACRES;
  geometryService.simplify([geometry], function(simplifiedGeometries) {
    areasAndLengthParams.polygons = simplifiedGeometries;
    geometryService.areasAndLengths(areasAndLengthParams, function(measurements){
       // do something with the results here
    });
  });
  ...
});

require([
  "esri/tasks/BufferParameters", "esri/SpatialReference", "dojo/dom", 
  "esri/tasks/GeometryService", ... 
], function(BufferParameters, SpatialReference, dom, GeometryService, ... ) {
  var params = new BufferParameters();
  params.geometries  = [ evt.mapPoint ];
  
  params.distances = [ dom.byId('bufferDistance').value ];
  params.unit = GeometryService.UNIT_KILOMETER;
  params.bufferSpatialReference = new SpatialReference({wkid: 32662});
  params.outSpatialReference = map.spatialReference;
  gsvc.buffer(params);
  ...
});

require([
  "esri/tasks/DensifyParameters", "esri/tasks/GeometryService", ... 
], function(DensifyParameters, GeometryService, ... ) {
  var geometryService = new GeometryService( ... );
  geometryService.on("densify-complete", densifyCompleteHandler);
  var geometries = [];
  geometries.push(geometry);

  var densifyParameters = new DensifyParameters();
  densifyParameters.geometries = geometries;
  densifyParameters.maxSegmentLength = 10;
  geometryService.densify(densifyParameters);
});

require([
  "esri/tasks/GeometryService", "esri/tasks/DistanceParameters", "dojo/dom", ... 
], function(GeometryService, DistanceParameters, dom, ... ) {
  var geometryService = new GeometryService( ... );
  var distParams = new DistanceParameters();
  distParams.distanceUnit = GeometryService.UNIT_STATUTE_MILE;
  
  distParams.geometry1 = inputPoints[inputPoints.length - 2];
  distParams.geometry2 = inputPoints[inputPoints.length - 1];
  distParams.geodesic = true;
  geometryService.distance(distParams, function(distance) {
    dom.byId('distanceDetails').innerHTML = distance;
  });
  ...
});

require([
  "esri/symbols/Font", "esri/symbols/TextSymbol", "esri/Color", "esri/Graphic", "dojo/_base/array", "dojo/number", ... 
], function(Font, TextSymbol, Color, Graphic, array, number, ... ) {
  geometryService.labelPoints(geometries, function(labelPoints) {
   var font = new Font("20px", Font.STYLE_NORMAL, Font.VARIANT_NORMAL, Font.WEIGHT_BOLDER);
    array.forEach(labelPoints, function(labelPoint) {
      var textSymbol = new TextSymbol(
        "X: " + number.format(labelPoint.x) + ", Y: " + number.format(labelPoint.y),
        font, new Color([0, 0, 0])
      );
      var labelPointGraphic = new Graphic(labelPoint,textSymbol);
      map.graphics.add(labelPointGraphic);
    });
  });
  ...
});

require([
  "esri/tasks/LengthsParameters", "esri/tasks/GeometryService", ... 
], function(LengthsParameters, GeometryService, ... ) {
  var lengthParams = new LengthsParameters();
  var geometryService = new GeometryService( ... );
  lengthParams.polylines = [geometry];
  lengthParams.lengthUnit = GeometryService.UNIT_METER;
  lengthParams.geodesic = true;
  geometryService.lengths(lengthParams);
  ...
});

require([
  "esri/tasks/ProjectParameters", ... 
], function(ProjectParameters, ... ) {
  var params = new ProjectParameters();
  params.geometries = [point];
  params.outSR = outSR;
  params.transformation = transformation;
  gsvc.project(params);
  ...
});

require([
  "esri/tasks/GeometryService", "esri/tasks/RelationParameters", ... 
], function(GeometryService, RelationParameters, ... ) {
  var geometryService = new GeometryService( ... );

  var relationParams = new RelationParameters();
  relationParams.geometries1 = geometries[0];
  relationParams.geometries2 = geometries[1];
  relationParams.relation = RelationParameters.SPATIAL_REL_WITHIN;
  
  geometryService.relation(relationParams, addRelateResultsToMap);
  ...
});

gsvc.reshape(targetGeometry,selectQuery.geometry);

gsvc.simplify([ polygonGraphic.geometry ], simplifyCallback);