Filter results subscribe() with keyvalue in Ionic

I would like to filter the results of a JSON file, I already retrieve the list of data with keyvalue. But I would like to retrieve only the results or parent equals null.

Example of the data present in the JSON file

{      "1": {          "id": 1,          "name": "Example name",          "parent": null,      },      "2": {          "id": 1,          "name": "Example name",          "parent": 12,      }  }  

Here is my data retrieved from a JSON file

this.http.get(api).subscribe((data) => {      this.number = Object.keys(data).length;      this.cats = data;  });  

And here is the HTML which processes the received data

<ion-row>      <ion-col *ngFor="let item of cats | keyvalue" size="6">                </ion-col>  </ion-row>  

https://stackoverflow.com/questions/67395052/filter-results-subscribe-with-keyvalue-in-ionic May 05, 2021 at 12:05PM