FeatureLayer modes (MODE_SELECTION and MODE_ONDEMAND) for JS 4.x

Mr_Kirkwood

I am new to the JS 4.x language. The JS 3.x had the modes. These helped with queries where you could zoom into a FeatureLayer  and have it turn on when zoomed to. The Featurelayer doesnt show up when using MODE_SELECTION until it was queried and selected. Here is an exapmple of the 3.x code:

floorOutline = new FeatureLayer (urlFloorOutline, {
                    mode: FeatureLayer.MODE_SELECTION,
                    id: 'floorOutline',
                    outFields: ["*"],
                    opacity: 0.8,
                });

This was added t othe map and did not show up on the map until you ran the zoom to fucntion:

function zoomFloorOutline (id)
{
    require ([
        "esri/tasks/query",
        "esri/geometry/ScreenPoint",
        "esri/geometry/Extent",
        "esri/layers/FeatureLayer"
    ],
            function (Query, ScreenPoint, Extent, FeatureLayer)
            {
                console.log ("zoomFloorOutline")
                clearGraphics ();
                var query = new Query ();
                query.objectIds = [id];
                var myDate = new Date ();
                var myMS = myDate.getMilliseconds ();
                query.where = "(" + myMS + "=" + myMS + ")";
                console.log ("zoomFloorOutline + id")

                floorOutline.selectFeatures (query, FeatureLayer.SELECTION_NEW, function (features)
                {
                    var floorExtent = features[0].geometry.getExtent ().expand (1.5);
                    map.setExtent (floorExtent);
                });
            });
}

 

How do i do something similar with JS 4.x?  I have some code to zoom to the feature but it is visible when the map is loaded and i just want show the quereied floor. 

function zoomFloorOutline (id)
{
    require ([
        "esri/rest/query",
        "esri/rest/support/Query",
        "esri/layers/FeatureLayer",
       "esri/views/layers/LayerView"
    ],
            function (query, Query, FeatureLayer,LayerView)
            {
                console.log ("zoomFloorOutline");

//                let highlight;
                view.whenLayerView (floorOutline).then (function (layerView)
                {

                    var query = floorOutline.createQuery ();
                    query.objectIds = [id];
                    query.where = "1=1";
                    floorOutline.queryFeatures (query).then (function (results)
                    {
                        const features = results.features;
                        console.log("zoom Floor" + features)
                        var geometry = features[0].geometry.extent.clone ().expand (2);
                        view.goTo (geometry);
                        
                        
                    });
                });
            });
}

 

Thanks for any help. 

JoelBennett

On line 21, instead of:

query.where = "1=1";

 

I think you need this instead:

query.where = roomsUseLayer.definitionExpression;

 

Or better yet, you could remove line 21 altogether, because according to the documentation for createQuery, the "where" setting should already be set according to the definitionExpression.  Setting it to "1=1" would overwrite that and return all features in the layer.