CODEWITHSUNDEEP
javascriptangulartypescript
Tammar
Tammar

Reputation: 25

know when @Input parameter is changed

I want to exec a function every time when the @Input is changed. I tried to do it that way:

 ngOnChanges(changes: { [propName: string]: SimpleChange }) {
  if( changes['inputName'] && changes['inputName'].previousValue != changes['inputName'].currentValue ) {
    this.func();
  }
}

but my problem is: my @Input value is'nt necessarily changed (it can be "a" and another once "a") but even if it's not changed I want to exec the function. what can I do?

Upvotes: 0

Views: 156

Answers (2)

Tammar
Tammar

Reputation: 25

I solved the problem by putting object in the @Input parameter instead of string only. and now it is changed every time I change it.

Upvotes: 0

Gaurang Dhorda
Gaurang Dhorda

Reputation: 3387

You need to call setter method For @Input() changed everytime..

@Input('inputName') set cmpRef (cmp : any){
   // your function call here goes every time @Input() changes, this setter method is called.
      this.func();
 }

Upvotes: 2

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