我已将喜欢的图标添加为有角图标，但颜色没有改变，刷新时也不会显示为喜欢的图标

Question

我在角度中添加了收藏夹图标，但是颜色没有变化，刷新时也没有显示为收藏夹。

favourite.component.html

在我添加的这些喜欢的图标中，但颜色没有改变。

<div class="dir-alp-con-right-1">
          <div class="row">
            <div class="row span-none" *ngIf="!isSpinner">
              <div class="col-md-4" *ngFor="let x of RentData | paginate: { itemsPerPage: 9, currentPage: p }">
                <a (click)="sendRentdetails(x)">
                  <!-- <a [routerLink]="['/saleconcreteplantdetails']" >   -->
                  <div class="list-mig-like-com com-mar-bot-30">
                    <div class="list-mig-lc-img"> <img src="{{x.image1}}" alt="Image"> </div>
                  </div>
                </a>
                    <div class="list-mig-lc-con">
                        <div class="primeimage">
                            <button class="btn btn-success">Rs. {{x.price}}</button>
                            <button class="favouri" (click)="isFavoritee(x.ad_Id)"><i class="fa"
                              [ngClass]="{'fa-heart' : isFavorite , 'fa-heart-o' : !isFavorite }"></i></button>
                        </div>
                      <div class="list-rat-ch list-room-rati">
                        <i class="fa fa-map-marker" aria-hidden="true"></i> {{x.location}} </div>
                      <h5>{{x.name}}</h5>
                      <h6>Other Machines > For Rent Other Machines</h6>
                    </div>
              </div>
            </div>
          </div>
        </div>

Answer 1

isFavoritee(elem: any) {
  this.toggle = !this.toggle;
  this.favouritedata = [];
  const favo = {
    'login_Id': this.localservice.getLoginId() ? this.localservice.getLoginId() : '',
    'ad_id' : elem ? elem : '',
    'category_Id' : 27,
    'mode': 'INSERT'
  };
  this.authservice.post('/api/Favourite/insert', favo).subscribe(data1 => {
    this.favouritedata = data1;
    console.log(this.favouritedata);
  }, error => {
      alert('something went wrong');
  });
}

Answer 2

我的问题是，当单击“收藏夹”按钮时，颜色没有改变，并且没有选择“刷新我的收藏夹”。

update.push("mylist").each(dataList)