Camera Panning via DoTween on click and drag of mouse

CameraPan.cs

using DG.Tweening;
using DG.Tweening.Core;
using DG.Tweening.Plugins.Options;
using UnityEngine;

public class CameraPan : MonoBehaviour
{
    [SerializeField] private new Camera camera;
    [SerializeField] private Ease easeType = Ease.OutExpo;
    [SerializeField] private float inertiaDuration = .33f;
    [SerializeField] private float inertiaAmount = 10f;

    [SerializeField] private int mouseButton = 0;
    [SerializeField] private float mouseSensitivity = 1f;

    [SerializeField] private Vector2 xPositionClamp = new Vector2(-100, 100);
    [SerializeField] private Vector2 yPositionClamp = new Vector2(-100, 100);

    [SerializeField] bool mouseXDirectionInverted;
    [SerializeField] bool mouseYDirectionInverted;

    private Vector3 _velocity;
    private Vector3 _targetPosition;
    private TweenerCore<Vector3, Vector3, VectorOptions> _tween;

    private void OnValidate()
    {
        // If we don't have a camera, skip this!
        if (Camera.main == null)
        {
            Debug.LogError("No main camera found");
            return;
        }

        // Find camera automatically and cache it
        camera = Camera.main;
    }

    private void Start()
    {
        // Set our target as what our camera is currently set to
        _targetPosition = camera.transform.localPosition;
    }

    private void Update()
    {
        // if we don't have a camera, don't do anything
        if (!camera) return;
        MoveCameraByMousePositionDelta();
    }

    private void MoveCameraByMousePositionDelta()
    {
        var movingObjectTransform = camera.transform;
        float mouseInputX = 0;
        float mouseInputY = 0;

        if (Input.GetMouseButtonDown(mouseButton)) // Mouse Button Pressed
        {
            // Reset on mouse down
            // This is to prevent the camera from moving based on the previous mouse velocity
            _velocity = Vector3.zero;
            _targetPosition = movingObjectTransform.localPosition;
        }
        
        if (Input.GetMouseButton(mouseButton)) // Mouse Button is held down
        {
            // Get mouse input
            mouseInputY = Input.GetAxis("Mouse Y") * mouseSensitivity * (mouseXDirectionInverted ? 1 : -1);
            mouseInputX = Input.GetAxis("Mouse X") * mouseSensitivity * (mouseYDirectionInverted ? 1 : -1);

            // Clean up old tween if it exists
            if (_tween != null && _tween.IsActive())
            {
                _tween.Kill();
            }
            
            // If we have movement, then we update our target position
            if (mouseInputX != 0 || mouseInputY != 0)
            {
                // Clamp target position
                var targetX = Mathf.Clamp(_targetPosition.x + mouseInputX, xPositionClamp.x, xPositionClamp.y);
                var targetY = Mathf.Clamp(_targetPosition.y + mouseInputY, yPositionClamp.x, yPositionClamp.y);

                // Set Target
                _targetPosition = new Vector3(targetX, targetY, _targetPosition.z);
                
                // Set Velocity
                _velocity = new Vector3(mouseInputX, mouseInputY);
            }

            // Update Position to target position
            movingObjectTransform.localPosition = _targetPosition;
        }
        
        if (Input.GetMouseButtonUp(mouseButton)) // Mouse Button Released
        {
            // Clean up old tween if it exists
            if (_tween != null && _tween.IsActive())
            {
                _tween.Kill();
            }
    
            // If we have movement, then we add inertia
            if (_velocity.sqrMagnitude > 0)
            {
                // Tween our inertia
                _tween = movingObjectTransform.DOLocalMove(_targetPosition + (_velocity * inertiaAmount), inertiaDuration)
                    .SetEase(easeType).OnUpdate(UpdateTargetPosition);
                
                // Update our target position to the new tween position
                void UpdateTargetPosition() => _targetPosition = movingObjectTransform.localPosition;
            }
        }
    }

    
}