Callback Events

UPDATE_RENDER_RANGE

• Type: (begin: number, end: number) => void
• Description: Triggered when the render range is updated.
• Parameters:
  • begin: The starting index of the render range.
  • end: The ending index of the render range.

UPDATE_VIRTUAL_SIZE

• Type: (virtualSize: number) => void
• Description: Triggered when the virtual list size is updated.
• Parameters:
  • virtualSize: The new size of the virtual list.

UPDATE_VIEW_RANGE

• Type: (begin: number, end: number) => void
• Description: Triggered when the view range is updated.
• Parameters:
  • begin: The starting index of the view range.
  • end: The ending index of the view range.

UPDATE_ITEM_SIZE

• Type: (id: string, size: number) => void
• Description: Triggered when an item's size is updated.
• Parameters:
  • id: The unique identifier of the item.
  • size: The new size of the item.

UPDATE_TRANSFORM_DISTANCE

• Type: (distance: number) => void
• Description: Triggered when the transform distance is updated.
• Parameters:
  • distance: The new transform distance.

SCROLL

• Type: (offset: number) => void
• Description: Triggered when a scroll event occurs.
• Parameters:
  • offset: The scroll offset.

SCROLL_TO_TOP

• Type: (firstItem: T) => void
• Description: Triggered when scrolling to the top.
• Parameters:
  • firstItem: The first item in the list.

SCROLL_TO_BOTTOM

• Type: (lastItem: T) => void
• Description: Triggered when scrolling to the bottom.
• Parameters:
  • lastItem: The last item in the list.

RENDER_LIST_CHANGE

• Type: (renderRange: { renderBegin: number; renderEnd: number }, renderList: T[], clientEl: HTMLElement | Element) => void
• Description: Triggered when the render list changes.
• Parameters:
  • renderRange: An object containing the render begin and end indices.
  • renderList: The list of currently rendered items.
  • clientEl: The client element.

SIZE_CHANGE

• Type: (sizes: IVirtualListChildrenSize) => void
• Description: Triggered when the size of list children changes.
• Parameters:
  • sizes: An object containing size information of the children.