copy YouTube subtitles

main.js

!(() => {
  const captionElements = document.getElementsByClassName('segment-text style-scope ytd-transcript-segment-renderer');
  const caption = [...captionElements]
    .reduce((result, element) => result + element.innerText + ' ', '')
    .replace(/[\.]/g, '.\n\n');
  
  const textArea = document.createElement('textarea');
  copyText = caption;
  textArea.value = copyText;
  document.body.appendChild(textArea);
  textArea.select();
  document.execCommand('Copy');
  textArea.remove();
})()