v4.30 - what is the utility of "esriConfig.request.proxyUrl" using alone

[LionelGOUBET]

Hi,

I don't understand the esriConfig.request.proxyUrl ...

If I use only this property it doesn't work the proxy is never used and i have to add  urlUtils.addProxyRule

Why ?

Sample:

const extent = new Extent({
xmin: 519515.85313172464,
ymin: 5630105.896252629,
xmax: 907815.9568202327,
ymax: 5767386.79905274,
spatialReference: new SpatialReference({wkid: 102100, latestWkid: 3857})
});

let layer = new MapImageLayer({
url:myUrl
});


esriConfig.request.proxyUrl = g_proxyUrl; // only doesn't work

/*
urlUtils.addProxyRule({
proxyUrl: my_proxyUrl,
urlPrefix: myPrefixUrl
});

urlUtils.addProxyRule({
proxyUrl: my_proxyUrl,
urlPrefix: "https://server.arcgisonline.com"
});*/

const tileLayer = new TileLayer({
url: "https://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"
});


const basemap = new Basemap({
baseLayers: [
tileLayer
]
});

let mapArcgisv4 = new Map({
basemap: basemap,
layers:[layer]
});

let view = new MapView({
map: mapArcgisv4,
extent : extent,
container: divHtmlId // Div element
});

Thanks for your explanation