IterableChangeRecord

interface

Record representing the item change information.

      
      interface IterableChangeRecord<V> {
  currentIndex: number | null
  previousIndex: number | null
  item: V
  trackById: any
}

子接口

属性	说明
`currentIndex: number \| null`	只读 Current index of the item in `Iterable` or null if removed.
`previousIndex: number \| null`	只读 Previous index of the item in `Iterable` or null if added.
`item: V`	只读 The item.
`trackById: any`	只读 Track by identity as computed by the `TrackByFunction`.