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angular / 6 / api / core / simplechange.html

SimpleChange

class

Represents a basic change from a previous to a new value.

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

Constructor

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

Parameters

previousValue

Type: any.
currentValue

Type: any.
firstChange

Type: 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

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Licensed under the Creative Commons Attribution License 4.0.
https://v6.angular.io/api/core/SimpleChange