@angular/core

SimpleChange

Class

stable

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.

API

    
      class SimpleChange<T = any> {  constructor(previousValue: T, currentValue: T, firstChange: boolean): SimpleChange<T>;  override previousValue: T;  override currentValue: T;  override firstChange: boolean;  isFirstChange(): boolean;}

constructor

SimpleChange<T>

@parampreviousValueT

@paramcurrentValueT

@paramfirstChangeboolean

@returnsSimpleChange<T>

previousValue

T

currentValue

T

firstChange

boolean

isFirstChange

boolean

Check whether the new value is the first value assigned.

@returnsboolean