This site uses cookies from Google to deliver its services and to analyze traffic.
Learn more
Skip to main content
Say hello to Angular's future home!Check out Angular.devHome
/
API > @angular/core

SimpleChange

Represents a basic change from a previous to a new value for a single property on a directive instance. Passed as a value in a SimpleChanges object to the ngOnChanges hook.

      
      class SimpleChange {
  constructor(previousValue: any, currentValue: any, firstChange: boolean)
  previousValue: any
  currentValue: any
  firstChange: boolean
  isFirstChange(): boolean
}

See also

Constructor

      
      constructor(previousValue: any, currentValue: any, firstChange: boolean)
Parameters
previousValue any
currentValue any
firstChange boolean

Properties

Property Description
previousValue: any Declared in Constructor
currentValue: any Declared in Constructor
firstChange: boolean Declared in Constructor

Methods

isFirstChange()

Check whether the new value is the first value assigned.

 
      
      isFirstChange(): boolean
Parameters

There are no parameters.

Returns

boolean