Conditional Image Src Binding in angular 2

[src]="item.pictureUrl!= null ? item.pictureUrl : myImgUrl"

then in your .ts

export class App{
   myImgUrl:string='~/images/logo.png';
}

[src]="item.pictureUrl ? item.pictureUrl : 'assets/img/logo.png'"

Maybe better way is to keep your images in assets folder: assets/img/logo.png