add read more at address clipboard

clipboard-copy.js

function addLink(event) {
  event.preventDefault();

  var pagelink = '\n\n Read more at: ' + document.location.href,
    copytext =  window.getSelection() + pagelink;

  if (window.clipboardData) {
    window.clipboardData.setData('Text', copytext);
  }
}

document.addEventListener('copy', addLink);
    
// http://stackoverflow.com/questions/2026335/how-to-add-extra-info-to-copied-web-text
// http://stackoverflow.com/users/577541/cronoss