import { CSSProperties } from 'react';
export declare type TimingFunction = 'linear' | 'ease' | 'easeIn' | 'easeOut' | 'easeInOut' | keyof typeof cubicBezierPresets | CubicBezier;
declare const cubicBezierPresets: {
    easeInSine: string;
    easeOutSine: string;
    easeInOutSine: string;
    easeInQuad: string;
    easeOutQuad: string;
    easeInOutQuad: string;
    easeInCubic: string;
    easeOutCubic: string;
    easeInOutCubic: string;
    easeInQuart: string;
    easeOutQuart: string;
    easeInOutQuart: string;
    easeInQuint: string;
    easeOutQuint: string;
    easeInOutQuint: string;
    easeInExpo: string;
    easeOutExpo: string;
    easeInOutExpo: string;
    easeInCirc: string;
    easeOutCirc: string;
    easeInOutCirc: string;
    easeInBack: string;
    easeOutBack: string;
    easeInOutBack: string;
};
export interface Transition<K extends keyof CSSProperties = any> {
    key: K;
    value: CSSProperties[K];
    activeValue: CSSProperties[K];
    duration: number;
    timing?: TimingFunction;
    delay?: number;
}
export declare function transition<K extends keyof CSSProperties>(key: K, value: CSSProperties[K], activeValue: CSSProperties[K], duration: number, timing?: TimingFunction, delay?: number): Transition<K>;
/** fadeIn is an alias of `transition('opacity', 0, 1, duration, timing, delay)` */
export declare function fadeIn(duration: number, timing?: TimingFunction, delay?: number): Transition<"opacity">;
/** fadeOut is an alias of `transition('opacity', 1, 0, duration, timing, delay)` */
export declare function fadeOut(duration: number, timing?: TimingFunction, delay?: number): Transition<"opacity">;
export interface PageTransition {
    enter: Transition | Transition[];
    exit: Transition | Transition[];
}
export declare function transitionsToStyle(a: Transition | Transition[]): [CSSProperties, CSSProperties, number];
declare class CubicBezier {
    x1: number;
    y1: number;
    x2: number;
    y2: number;
    constructor(x1: number, y1: number, x2: number, y2: number);
    toString(): string;
}
export declare function cubicBezier(x1: number, y1: number, x2: number, y2: number): CubicBezier;
export {};