/// <reference types="react" />
import { BrowserQRCodeReader } from '@zxing/browser';
import { Result } from '@zxing/library';
import * as React$1 from 'react';

declare type QrReaderProps = {
    /**
     * Media track constraints object, to specify which camera and capabilities to use
     */
    constraints: MediaTrackConstraints;
    /**
     * Called when an error occurs.
     */
    onResult?: OnResultFunction;
    /**
     * Property that represents the view finder component
     */
    ViewFinder?: (props: any) => React.ReactElement<any, any> | null;
    /**
     * Property that represents the scan period
     */
    scanDelay?: number;
    /**
     * Property that represents the ID of the video element
     */
    videoId?: string;
    /**
     * Property that represents an optional className to modify styles
     */
    className?: string;
    /**
     * Property that represents a style for the container
     */
    containerStyle?: any;
    /**
     * Property that represents a style for the video container
     */
    videoContainerStyle?: any;
    /**
     * Property that represents a style for the video
     */
    videoStyle?: any;
};
declare type OnResultFunction = (
/**
 * The QR values extracted by Zxing
 */
result?: Result | undefined | null, 
/**
 * The name of the exceptions thrown while reading the QR
 */
error?: Error | undefined | null, 
/**
 * The instance of the QR browser reader
 */
codeReader?: BrowserQRCodeReader) => void;
declare type UseQrReaderHookProps = {
    /**
     * Media constraints object, to specify which camera and capabilities to use
     */
    constraints?: MediaTrackConstraints;
    /**
     * Callback for retrieving the result
     */
    onResult?: OnResultFunction;
    /**
     * Property that represents the scan period
     */
    scanDelay?: number;
    /**
     * Property that represents the ID of the video element
     */
    videoId?: string;
};
declare type UseQrReaderHook = (props: UseQrReaderHookProps) => void;

declare const useQrReader: UseQrReaderHook;

declare const QrReader: React$1.FC<QrReaderProps>;

export { OnResultFunction, QrReader, QrReaderProps, UseQrReaderHook, UseQrReaderHookProps, useQrReader };