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API > @angular/core

KeyValueDiffer

A differ that tracks changes made to an object over time.

      
      interface KeyValueDiffer<K, V> {
  diff(object: any): KeyValueChanges<K, V> | null
}

方法

diff()

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

diff(object: { [key: string]: V; }): KeyValueChanges<string, V> | null
      
      diff(object: { [key: string]: V; }): KeyValueChanges<string, V> | null
参数
object object

containing the new value.

返回值

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