import { ElementRef } from '@angular/core';
export declare class DigitOnlyBase {
    protected inputElement: ElementRef;
    regex: RegExp;
    constructor(inputElement: ElementRef);
    onKeyDown(e: KeyboardEvent): void;
    allowKey(e: KeyboardEvent): boolean;
    onkeyup(): void;
    onPaste(event: ClipboardEvent): void;
    onDrop(event: DragEvent): void;
}