import { OnInit } from '@angular/core';
import { FileInfoType } from '@schoolbelle/api/file';
import { DomSanitizer } from '@angular/platform-browser';
export declare class LetterWriteFileListPreviewComponent implements OnInit {
    protected sanitizer: DomSanitizer;
    file: FileInfoType | File;
    readonly type: string;
    readonly thumbnail: string;
    objectURL: string;
    readonly preview: import("@angular/platform-browser").SafeResourceUrl;
    constructor(sanitizer: DomSanitizer);
    ngOnInit(): void;
}