[add]

年齢表示の処理を追加

src/app/pages/danka-detail/danka-detail.html

                       </div>
 
                       <div>
-                        -
+                        {{ getAge(family.birthDate)}}
                       </div>
 
                       <div>

src/app/pages/danka-detail/danka-detail.ts

     private familyService: FamilyService,
     private route: ActivatedRoute,
   ) {
+    //遷移先のIDから該当の世帯と家族基本を取得
     const id = this.route.snapshot.params['id'];
     if (id) {
       this.danka = this.dankaService.getDankaById(id);
     console.log(this.danka);
     console.log(this.families);
   }
+
+  getAge(birthDate: string) {
+    if (birthDate === '') {
+      return '-';
+    }
+
+    const birth = new Date(birthDate);
+    const today: Date = new Date();
+    const thisYearBirthday = new Date(today.getFullYear(), birth.getMonth(), birth.getDate());
+
+    let age = today.getFullYear() - birth.getFullYear();
+
+    if (thisYearBirthday > today) {
+      age--;
+    }
+    return age.toString();
+  }
 }

src/app/services/family-service.ts

   getFamiliesByDankaId(dankaId: string): Family[] {
     return this.families.filter((family) => family.dankaId === dankaId);
   }
+
+
   // getFamilyById(id: string);
   // addFamily(family: Family);
   // updateFamily(family: Family);