his.items =  this.items.map((item: string) =>

this.items =  this.items.map((item: string) => {
     if(item.better_featured_image == null){
      let item.better_featured_image = {};
      item.better_featured_image.media_details.sizes.thumbnail.source_url = 'logo-web-color.png';



     }

     return item;
     });