KeyValueDiffers

class

A repository of different Map diffing strategies used by NgClass, NgStyle, and others.

      
      class KeyValueDiffers {
  static ngInjectableDef: defineInjectable({...})
  static create<S>(factories: KeyValueDifferFactory[], parent?: KeyValueDiffers): KeyValueDiffers
  static extend<S>(factories: KeyValueDifferFactory[]): StaticProvider
  constructor(factories: KeyValueDifferFactory[])
  factories: KeyValueDifferFactory[]
  find(kv: any): KeyValueDifferFactory
}

Static properties

Property	Description
`static ngInjectableDef: defineInjectable({ providedIn: 'root', factory: () => new KeyValueDiffers([new DefaultKeyValueDifferFactory()]) })`

Static methods

create()

      
      static create<S>(factories: KeyValueDifferFactory[], parent?: KeyValueDiffers): KeyValueDiffers

Parameters

`factories`	`KeyValueDifferFactory[]`
`parent`	`KeyValueDiffers`	Optional. Default is `undefined`.

Returns

KeyValueDiffers

extend()

Takes an array of KeyValueDifferFactory and returns a provider used to extend the inherited KeyValueDiffers instance with the provided factories and return a new KeyValueDiffers instance.

      
      static extend<S>(factories: KeyValueDifferFactory[]): StaticProvider

Parameters

factories KeyValueDifferFactory[]

Returns

StaticProvider

Usage Notes

Example

The following example shows how to extend an existing list of factories, which will only be applied to the injector for this component and its children. This step is all that's required to make a new KeyValueDiffer available.

      
      @Component({
  viewProviders: [
    KeyValueDiffers.extend([new ImmutableMapDiffer()])
  ]
})

Constructor

      
      constructor(factories: KeyValueDifferFactory[])

Parameters

factories KeyValueDifferFactory[]

Properties

Property	Description
`factories: KeyValueDifferFactory[]`

Methods

find()

      
      find(kv: any): KeyValueDifferFactory

Parameters

kv any

Returns

KeyValueDifferFactory