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API / @angular/core

KeyValueChanges

An object describing the changes in the Map or {[k:string]: string} since last time KeyValueDiffer#diff() was invoked.

interface KeyValueChanges<K, V> { forEachItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void forEachPreviousItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void forEachChangedItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void forEachAddedItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void forEachRemovedItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void }

方法

forEachItem()

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

forEachItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void

参数

fn

Type: (r: KeyValueChangeRecord) => void.

返回值

void

forEachPreviousItem()

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

forEachPreviousItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void

参数

fn

Type: (r: KeyValueChangeRecord) => void.

返回值

void

forEachChangedItem()

Iterate over all keys for which values have changed.

forEachChangedItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void

参数

fn

Type: (r: KeyValueChangeRecord) => void.

返回值

void

forEachAddedItem()

Iterate over all added items.

forEachAddedItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void

参数

fn

Type: (r: KeyValueChangeRecord) => void.

返回值

void

forEachRemovedItem()

Iterate over all removed items.

forEachRemovedItem(fn: (r: KeyValueChangeRecord<K, V>) => void): void

参数

fn

Type: (r: KeyValueChangeRecord) => void.

返回值

void