fctrlx-angular-file-reader/lib/services/file-reader.interface.d.ts

Angular library that helps convert file (from input[type=file]) to base64/arrayBuffer/text using FileReader API.

import { Observable } from 'rxjs';
export interface FileReaderInterface {
    toBase64(file: File): Observable<string> | Promise<string>;
    toText(file: File): Observable<string> | Promise<string>;
    toArrBuf(file: File): Observable<string> | Promise<string>;
}