export declare type ReactiveVar<T> = {
    (newValue?: T | ((value: T) => T)): T;
    subscribe: (handler: Function) => () => void;
    unsubscribe: (handler: Function) => void;
};
declare type EqualsFunc<T> = (a: T, b: T) => boolean;
export declare const makeVar: <T extends unknown>(initialValue: T, equalsFunc?: EqualsFunc<T> | undefined) => ReactiveVar<T>;
export declare const useReactiveVar: <T extends unknown>(reactiveVar: ReactiveVar<T>) => T;
export {};