/**
 * Returns the duration as a string in terms of milliseconds, seconds, minutes, hours, days, months and years. Note that months are considered to be 30 days and years 365 days.
 *
 * @example
 * Basic usage
 * ```js
 * // A starting Date somewhere in your code
 * const startDate = new Date() // or Date.now()
 *
 * // When you want to know the elapsed duration, pass the start date
 * const duration = prettyDuration(startDate)
 * // Returns something like "22 days, 6 h, 3 min, 15 sec, 3 ms"
 *
 * // If you want to console.log it, set the option log to true
 * prettyDuration(startDate, {log: true})
 *
 * // You can also use a prefix and/or suffix
 * prettyDuration(startDate, {log: true, prefix: "Total duration: ", suffix: " (Main function)"})
 * // Returns and logs something like "Total duration: 3 min, 15 sec, 3 ms (Main function)"
 *
 * // If you want to format the duration between two specific dates, use the end option.
 * prettyDuration(new Date("2024-01-01T17:00:00"), { end: new Date("2024-01-23T23:03:15") })
 * // Returns "22 days, 6 h, 3 min, 15 sec, 0 ms"
 * ```
 *
 * @param start - The start date or timestamp.
 * @param options - Optional settings.
 * @param options.log - If true, logs the duration to the console.
 * @param options.end - The end date or timestamp.
 * @param options.prefix - A string to prefix the duration with.
 * @param options.suffix - A string to suffix the duration with.
 *
 * @category Formatting
 */
export default function prettyDuration(start: Date | number, options?: {
    log?: boolean;
    end?: Date | number;
    prefix?: string;
    suffix?: string;
}): string;