Initially expanded OverviewMap is blank

Describe the bug Using openlayer 4.6.5

When the map is displayed with an initially expanded (collapsed: false) OverviewMap control added, the overview map is blank and is it only shows the layer after it is collapsed and then expanded again.

var overviewMap = new ol.control.OverviewMap({
	  collapsed: false.
	  layers: new ol.layer.Tile({
		source: new ol.source.OSM()
             	}),
	  view: new ol.View(),
});
map.addControl(overviewMap);

[agiudiceandrea]

Thanks @ahocevar. As you can see in the previously linked code snippets, the command to set the map view extent (generated by the QGIS/qgis2web plugin) is in fact:

map.getView().fit([666205.581372, 4548772.644111, 671179.853857, 4552155.819337], map.getSize());

It works fine if it’s executed before the control is added to the map

map.getView().fit([666205.581372, 4548772.644111, 671179.853857, 4552155.819337], map.getSize());
map.addControl(overviewMap);

but not if it’s executed after the control is added to the map

map.addControl(overviewMap);
map.getView().fit([666205.581372, 4548772.644111, 671179.853857, 4552155.819337], map.getSize());

[stale[bot]]

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