Generates a markdown link for the page.

BOOKMARKLET: Markdown link

javascript: 
var og_site = document.querySelector("meta[property='og:site_name']") ? document.querySelector("meta[property='og:site_name']").getAttribute('content') : null;
var og_title = document.querySelector("meta[property='og:title']") ? document.querySelector("meta[property='og:title']").getAttribute('content') : null;
var channel = (og_site == 'YouTube' && document.querySelector("a.ytp-ce-channel-title")) ? document.querySelector("a.ytp-ce-channel-title").text : null;
var title = og_title ? `${og_title}` : document.title;
if(channel){title = `${title} - ${channel}`};
if(og_site){title = `${title} - ${og_site}`};
if (title) {
  var re = /(\\|\/|:|\*|\?|\"|<|>|\|)/gi;
  title = title.replace(re, '');
  link = `[${title}](${window.location})`;
  void(prompt('Markdown link', link));
}