export declare class DndDirective {
    private allowed_extensions;
    private filesChangeEmiter;
    private filesInvalidEmiter;
    private filesBase64DataEmiter;
    background: string;
    constructor();
    onDragOver(evt: any): void;
    onDragLeave(evt: any): void;
    onDrop(evt: any): void;
}
export declare class Base64FileData {
    name: string;
    size: number;
    type: string;
    data64: string;
}