/**
 * Generates a QR code with the given content and options.
 * @param content - The text/content to encode in the QR code.
 * @param width - The width/size of the QR code.
 * @param level - The error correction level ('L', 'M', 'Q', 'H') (default: 'M').
 * @param color - The color of the QR code (default: '#000000').
 * @param backgroundColor - The background color of the QR code (default: '#FFFFFF').
 * @param outputType - The output type: 'canvas', 'svg', or 'url' (default: 'canvas').
 * @param canvas - Optional canvas element reference if output type is 'canvas'.
 * @param svg - Optional SVG element reference if output type is 'svg'.
 * @returns A Promise that resolves with a URL if the output type is 'url', or void for other types.
 */
declare function generateQRCode(content: string, // Mandatory content parameter
width: number, // Mandatory size parameter
level: 'L' | 'M' | 'Q' | 'H', // Default level is 'M'
color: string, // Default color is black
backgroundColor: string, // Default background color is white
outputType?: 'canvas' | 'svg' | 'url', // Default output type is 'canvas'
canvas?: HTMLCanvasElement, // Optional canvas element for canvas output
svg?: HTMLElement): Promise<string | void>;

export { generateQRCode };