Camera Interpolation

I have used v3d.SimplePreloader to load a glTF model. I want the camera to transition from its current position and lookat to a desired one on click of a button. I am able to get the current camera position and lookat and need to know how to do the camera interpolation.

// Get the camera object from the scene
  let sceneCamera = app.scene.getObjectByName("Camera");

  // Calculate the camera's current position and target
  let initialPosition = sceneCamera.position.clone();

  let camLookAt = new v3d.Vector3();
  sceneCamera.getWorldDirection(camLookAt);
  let initialTarget = camLookAt;

  // Set the target position and lookat direction for the camera
  let newPosition = new v3d.Vector3(-0.1624367, 0.182233, 0.4044204);
  let newTarget = new v3d.Vector3(0.0, -0.23743, -0.9714045);

Thanks