2020-03-11～2020-04-12まで無料公開の小学館版学習まんが 少年少女日本の歴史 https://kids-km3.shogakukan.co.jp/ で←→キーでページをめくれる様にするbookmarklet

bookmarklet

javascript:(function(){const e=document.getElementById("tap_left_area"),t=document.getElementById("tap_right_area");document.addEventListener("keydown",n=>{"ArrowLeft"===n.key&&e.click(),"ArrowRight"===n.key&&t.click()})})();

origin.js

(function(){
  const leftButton = document.getElementById('tap_left_area')
  const rightButton = document.getElementById('tap_right_area')
  document.addEventListener('keydown', e => {
    if ('ArrowLeft' === e.key) leftButton.click()
    if ('ArrowRight' === e.key) rightButton.click()
  })
})()