viewer.screenSpaceEventHandler.setInputAction(function onm ouseMove(
  movement
) {
  // If a feature was previously highlighted, undo the highlight
  if (Cesium.defined(highlighted.feature)) {
    highlighted.feature.color = highlighted.originalColor;
    highlighted.feature = undefined;
  }

  // Pick a new feature
  var pickedFeature = viewer.scene.pick(movement.endPosition);
  if (!Cesium.defined(pickedFeature)) {
    return;
  }

  // Highlight the feature
  highlighted.feature = pickedFeature;
  Cesium.Color.clone(pickedFeature.color, highlighted.originalColor);
  pickedFeature.color = Cesium.Color.YELLOW;
},
Cesium.ScreenSpaceEventType.MOUSE_MOVE);

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