import type { $Chronos, ChronosInput, FromNowUnit } from '../types';
declare module '../Chronos' {
    interface Chronos {
        /**
         * @instance Returns full time difference from now (or a specified time) down to a given level.
         *
         * @param level Determines the smallest unit to include in the output (e.g., 'minute' will show up to minutes, ignoring seconds). Defaults to `second`.
         * @param withSuffixPrefix If `true`, adds `"in"` or `"ago"` depending on whether the time is in the future or past. Defaults to `true`.
         * @param time An optional time value to compare with (`string`, `number`, `Date`, or `Chronos` instance). Defaults to `now`.
         * @returns The difference as a human-readable string, e.g., `2 years 1 month 9 days 18 hours 56 minutes ago`.
         *
         *  @remarks
         * - This method calculates the **elapsed time difference** (exclusive of the end day), consistent with libraries like `Day.js` and `Luxon`.
         * - If you need an *inclusive calendar-style* difference (counting both start and end days), adjust one day manually before calling `fromNow()`.
         */
        fromNow(level?: FromNowUnit, withSuffixPrefix?: boolean, time?: ChronosInput): string;
    }
}
/** * Plugin to inject `fromNow` method */
export declare const fromNowPlugin: ($Chronos: $Chronos) => void;