how to drag and drop an object in unity 2d code example

Example: 2d item dragging unity

public class followMouse : MonoBehaviour
{

    bool canDrag = false;

    Vector3 itemPos;
    void Update()
    {
        transform.position = Input.mousePosition;
        if (!Input.GetMouseButton(0))
        {
            canDrag = false;
        }

    }
    
    void OnTriggerStay2D(Collider2D other)
    {
        if (other.CompareTag("itemIcon"))
        {
            if (Input.GetMouseButton(0))
            {
                canDrag = true;
                other.transform.position = Input.mousePosition;
            }
            
        }
    }



}