I want to make the earth rotate

[SeongminJaden]

Please tell me how to use it in Resium. I successfully implemented this code in CesiumJS's sandcastle, but I can't do it in Resium. Please help.

const viewer = new Cesium.Viewer("cesiumContainer");
const scene = viewer.scene;
const clock = viewer.clock;

viewer.dataSources.add(Cesium.CzmlDataSource.load(czml));

const camera = new Cesium.Camera(scene);

// 1. Fly to a position with a top-down view
viewer.camera.flyTo({
destination : Cesium.Cartesian3.fromDegrees(126, 37, 15000000.0)
});

// 1. Using a cartesian offset
//const center = Cesium.Cartesian3.fromDegrees(-98.0, 40.0);
//viewer.camera.lookAt(center, new Cesium.Cartesian3(0.0, -4790000.0, 3930000.0));

function icrf(scene, time) {
if (scene.mode !== Cesium.SceneMode.SCENE3D) {
return;
}

var icrfToFixed = Cesium.Transforms.computeIcrfToFixedMatrix(time);
if (Cesium.defined(icrfToFixed)) {
    var camera = viewer.camera;
    var offset = Cesium.Cartesian3.clone(camera.position);
    var transform = Cesium.Matrix4.fromRotationTranslation(icrfToFixed);
    camera.lookAtTransform(transform, offset);
}

}

viewer.scene.postUpdate.addEventListener(icrf);