data-fetching

import { useEffect, useRef, useState } from "react";

export type AsyncState<T> =
  | { status: "loading" }
  | { status: "error"; error: Error }
  | { status: "success"; data: T };

import { useCallback, useEffect, useState } from "react";

interface Options {
  rootMargin?: string;
  threshold?: number;
}