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API > @angular/core

IterableDiffers

A repository of different iterable diffing strategies used by NgFor, NgClass, and others.

      
      class IterableDiffers {
  static ngInjectableDef: ɵɵdefineInjectable({...})
  static create(factories: IterableDifferFactory[], parent?: IterableDiffers): IterableDiffers
  static extend(factories: IterableDifferFactory[]): StaticProvider
  constructor(factories: IterableDifferFactory[])
  factories: IterableDifferFactory[]
  find(iterable: any): IterableDifferFactory
}

Static properties

Property Description
static ngInjectableDef: ɵɵdefineInjectable({ providedIn: 'root', factory: () => new IterableDiffers([new DefaultIterableDifferFactory()]) })

Static methods

create()

static create(factories: IterableDifferFactory[], parent?: IterableDiffers): IterableDiffers
      
      static create(factories: IterableDifferFactory[], parent?: IterableDiffers): IterableDiffers
Parameters
factories IterableDifferFactory[]
parent IterableDiffers

Optional. Default is undefined.
Returns

IterableDiffers

extend()

Takes an array of IterableDifferFactory and returns a provider used to extend the inherited IterableDiffers instance with the provided factories and return a new IterableDiffers instance.
static extend(factories: IterableDifferFactory[]): StaticProvider
      
      static extend(factories: IterableDifferFactory[]): StaticProvider
Parameters
factories IterableDifferFactory[]
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 IterableDiffer available.

@Component({ viewProviders: [ IterableDiffers.extend([new ImmutableListDiffer()]) ] }) 
      
      @Component({
  viewProviders: [
    IterableDiffers.extend([new ImmutableListDiffer()])
  ]
})

Constructor

constructor(factories: IterableDifferFactory[])
      
      constructor(factories: IterableDifferFactory[])
Parameters
factories IterableDifferFactory[]

Properties

Property Description
factories: IterableDifferFactory[]

Methods

find()

find(iterable: any): IterableDifferFactory
      
      find(iterable: any): IterableDifferFactory
Parameters
iterable any
Returns

IterableDifferFactory