/**
 * Use this hook if you want to change the opacity of an element dynamically based on where an element is in the current viewport.
 * Opacity will be 1 when the element is in the middle of the viewport, and 0 when it is outside of the viewport.
 * @returns
 */
export declare function useScrollFadeTransition(): {
    ref: import("react").RefObject<null>;
    opacity: number;
};
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