〜〜略〜〜

  const allowedKeys = ['x-craft-preview', 'x-craft-live-preview', 'token']
  const filteredParams = Object.entries(
    Object.fromEntries(url.searchParams)
  ).filter(([key]) => allowedKeys.includes(key))
    if (filteredParams.length) {
      const queryString = filteredParams.map((val) => val.join('=')).join('&')
      let res = await fetch(`${END_POINT}?${queryString}`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'Authorization': API_TOKEN,
        },
        body: JSON.stringify({
          query: `
          query($slug: [String]) {

〜〜略〜〜