How to filter data on Object in Angular

I get data from backend with this function

  private loaddata(): void {
    this.dataService.loaddata().pipe(
      tap((response: any) => {
        this.persons = response.results;
        this.personmembertrue = this.persons.filter(x => x.is_family_member === 'false')
      }),
      takeUntil(this.onComponentDestroy)
    ).subscribe();
  }

and console.log(response) show JSON like below

{
    "count": 38,
    "next": null,
    "previous": null,
    "results": [
        {
            "id": 113,
            "foreigner": false,
            "outside_community": false,
            "nipt": "",
            "nid": "G45675570K",
            "is_family_member": true
        },
        {
            "id": 115,
            "foreigner": false,
            "outside_community": false,
            "nipt": "",
            "nid": "K30776771A",
            "is_family_member": false
        },
        {
            "id": 116,
            "foreigner": false,
            "outside_community": false,
            "nipt": "",
            "nid": "J305070577",
            "is_family_member": false
        }...
      ]
    }

What I want are data that have "is_family_member": false, for this I create this.personmembertrue = this.persons.filter(x => x.is_family_member === 'false')

this part of code show empty.

Any idea please how to show data with "is_family_member": false

Answer

Change the condition to:

this.personmembertrue = this.persons.filter(x => x.is_family_member === false);

See if that works.