SecurityError：对于base64 Angular 2，操作不安全

Question

我在使用SecurityError: The operation is insecure.显示图片时收到错误Base64。我已经应用Sanitize，如下所示，我也收到错误。

constructor(private _sanitizer: DomSanitizer) { }
    transform(v: string) {
        return this._sanitizer.bypassSecurityTrustResourceUrl(v);
    }