IterableChanges

interface

npm Package	@angular/core
Module	import { IterableChanges } from '@angular/core';
Source	core/src/change_detection/differs/iterable_differs.ts

Interface Overview

interface IterableChanges<V> { 
  forEachItem(fn: (record: IterableChangeRecord<V>) => void): void
  forEachOperation(fn: (record: IterableChangeRecord<V>, previousIndex: number, currentIndex: number) => void): void
  forEachPreviousItem(fn: (record: IterableChangeRecord<V>) => void): void
  forEachAddedItem(fn: (record: IterableChangeRecord<V>) => void): void
  forEachMovedItem(fn: (record: IterableChangeRecord<V>) => void): void
  forEachRemovedItem(fn: (record: IterableChangeRecord<V>) => void): void
  forEachIdentityChange(fn: (record: IterableChangeRecord<V>) => void): void
}

Description

An object describing the changes in the Iterable collection since last time IterableDiffer#diff() was invoked.

Class Implementations

• DefaultIterableDiffer

Members

forEachItem(fn: (record: IterableChangeRecord<V>) => void): void

Iterate over all changes. IterableChangeRecord will contain information about changes to each item.

forEachOperation(fn: (record: IterableChangeRecord<V>, previousIndex: number, currentIndex: number) => void): void

Iterate over a set of operations which when applied to the original Iterable will produce the new Iterable.

NOTE: These are not necessarily the actual operations which were applied to the original Iterable, rather these are a set of computed operations which may not be the same as the ones applied.

forEachPreviousItem(fn: (record: IterableChangeRecord<V>) => void): void

Iterate over changes in the order of original Iterable showing where the original items have moved.

forEachAddedItem(fn: (record: IterableChangeRecord<V>) => void): void

Iterate over all added items.

forEachMovedItem(fn: (record: IterableChangeRecord<V>) => void): void

Iterate over all moved items.

forEachRemovedItem(fn: (record: IterableChangeRecord<V>) => void): void

Iterate over all removed items.

forEachIdentityChange(fn: (record: IterableChangeRecord<V>) => void): void

Iterate over all items which had their identity (as computed by the trackByFn) changed.