Dragable element

export const dragElement = (
  elementToDrag: HTMLDivElement,
  dragButtonRef: HTMLButtonElement,
  options?: {
    mouseUpCallback?: (e: MouseEvent) => void;
    isInScreenDrag?: boolean;
    screenElement?: HTMLElement | null;
    isDragFullElementOnScreen?: boolean;
  }
) => {
  const screenElement = options?.screenElement;
  const isInScreenDrag = options?.isInScreenDrag;
  const mouseUpCallback = options?.mouseUpCallback;
  const isDragFullElementOnScreen = options?.isDragFullElementOnScreen;

  let pos1 = 0,
    pos2 = 0,
    pos3 = 0,
    pos4 = 0;
  if (dragButtonRef) {
    dragButtonRef.addEventListener("mousedown", (e) => dragMouseDown(e));
  } else if (elementToDrag) {
    elementToDrag.addEventListener("mousedown", (e) => dragMouseDown(e));
  }
  function dragMouseDown(e: MouseEvent) {
    e.preventDefault();
    pos3 = e.clientX;
    pos4 = e.clientY;
    document.onmouseup = closeDragElement;
    document.onmousemove = elementDrag;
  }
  function elementDrag(e: MouseEvent) {
    e.preventDefault();
    // calculate the new cursor position:
    pos1 = pos3 - e.clientX;
    pos2 = pos4 - e.clientY;
    pos3 = e.clientX;
    pos4 = e.clientY;
    // set the element's new position:
    if (elementToDrag) {
      const elementTopOffset = elementToDrag.offsetTop;
      const elementLeftOffset = elementToDrag.offsetLeft;
      let topVal = elementTopOffset - pos2;
      let leftVal = elementLeftOffset - pos1;

      // Condition For Keeping Toolbar in Window
      if (topVal < 0) {
        topVal = 0;
      }
      if (leftVal < 0) {
        leftVal = 0;
      }

      if (isInScreenDrag) {
        const elementHeight = isDragFullElementOnScreen
          ? 8
          : elementToDrag.offsetHeight;
        const elementWidth = isDragFullElementOnScreen
          ? 8
          : elementToDrag.offsetWidth;
        const windowHeight = screenElement?.clientHeight || window.innerHeight;
        const windowWidth = screenElement?.clientWidth || window.innerWidth;

        if (topVal + elementHeight > windowHeight) {
          topVal = windowHeight - elementHeight;
        }

        if (leftVal + elementWidth > windowWidth) {
          leftVal = windowWidth - elementWidth;
        }
      }

      elementToDrag.style.top = `${topVal}px`;
      elementToDrag.style.left = `${leftVal}px`;
    }
  }
  function closeDragElement(e: MouseEvent) {
    // stop moving when mouse button is released:
    document.onmouseup = null;
    document.onmousemove = null;
    mouseUpCallback?.(e);
  }
};