BookLive! の作品ページでフォロー解除ができるようにするブックマークレット

booklive-delete-notification.bookmarklet.js

javascript:(function(){var e=function(){var c,a,b;return null==(a=null==(c=document.querySelector("link[rel='canonical']"))?void 0:c.href)?void 0:null==(b=a.match(/title_id\/(\d+)\//))?void 0:b[1]}();null==e?alert("Can't get title-id."):function(c){var a=document.createElement("iframe");a.src="/follow/title-list";document.querySelector("body").appendChild(a);var b=a.contentWindow;b.addEventListener("DOMContentLoaded",function(){var f=b.document.querySelector("#title_list_form input[name='token']").value,d=new FormData;d.append("token",f);d.append("title_id[]",c);d.append("notice_type",1);fetch("/follow/notification-delete",{method:"POST",body:d}).then(function(){location.reload()})})}(e)})();

booklive-delete-notification.js

;(() => {
  const getTitleId = () => {
    const url = document.querySelector("link[rel='canonical']")?.href
    return url?.match(/title_id\/(\d+)\//)?.[1]
  }

  const deleteNotification = (titleId) => {
    const iframe = document.createElement('iframe')
    iframe.src = '/follow/title-list'

    const body = document.querySelector('body')
    body.appendChild(iframe)

    const win = iframe.contentWindow
    win.addEventListener('DOMContentLoaded', () => {
      const token = win.document.querySelector("#title_list_form input[name='token']").value

      const data = new FormData()
      data.append('token', token)
      data.append('title_id[]', titleId)
      data.append('notice_type', 1)

      fetch('/follow/notification-delete', {
        method: 'POST',
        body: data,
      }).then(() => {
        location.reload()
      })
    })
  }

  const titleId = getTitleId()
  if (titleId == null) {
    alert("Can't get title-id.")
    return
  }

  deleteNotification(titleId)
})()

ブックマークレットの登録方法はこのあたりを参照 https://qiita.com/aqril_1132/items/b5f9040ccb8cbc705d04