import { FileEngine } from './engines/FileEngine';
export declare class FileUploadedEvent extends Event {
    readonly file: File;
    readonly hasHeader: boolean;
    readonly sheet: string | null;
    readonly headerRows: number;
    constructor(file: File, hasHeader: boolean, sheet: string | null, headerRows?: number);
}
export default class UploadElement extends HTMLElement {
    private readonly engines;
    private readonly example;
    private file;
    private mimeTypes;
    private extensions;
    private canStartOver;
    private tooltipManager;
    private dropdownManager;
    private selectedSheet;
    private hasHeader;
    private headerRows;
    private sampleFileBlobUrl;
    constructor(engines: FileEngine[], example?: string | File | null, uploadedFile?: File);
    connectedCallback(): void;
    disconnectedCallback(): void;
    private setupDropZone;
    private setupFileInput;
    private handleFile;
    private reset;
    private cleanupBlobUrl;
    private markAsLoading;
    private fileUploaded;
    private getSheetNames;
}