I want the camera movement made with the mouse to be the same as on this site. https://bruno-simon.com/

my codes but it doesnt work:

      document.addEventListener("mousedown", function (event) { 
        previousMousePosition.x = event.clientX;
        previousMousePosition.y = event.clientY;
        $("body").removeClass("grab");
        $("body").addClass("grabbing");
      });

      document.addEventListener("mouseup", function () {
        $("body").removeClass("grabbing");
        $("body").addClass("grab"); 
          var deltaMove = {
            x: event.clientX - previousMousePosition.x,
            y: event.clientY - previousMousePosition.y,
          };

          // Kameranın pozisyonunu güncelle
          camera.position.x -= deltaMove.x * 0.05;
          camera.position.z -= deltaMove.y * 0.05;

          // Önceki fare konumunu güncelle
          previousMousePosition = {
            x: event.clientX,
            y: event.clientY,
          };
     
      });