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API > @angular/core

IterableDiffer

A strategy for tracking changes over time to an iterable. Used by NgForOf to respond to changes in an iterable by effecting equivalent changes in the DOM.

      
      interface IterableDiffer<V> {
  diff(object: NgIterable<V>): IterableChanges<V> | null
}

Class implementations

Methods

diff()

Compute a difference between the previous state and the new object state.

 
      
      diff(object: NgIterable<V>): IterableChanges<V> | null
Parameters
object NgIterable<V>

containing the new value.
Returns

IterableChanges<V> | null: an object describing the difference. The return value is only valid until the next diff() invocation.