Prev Next JS injection

script.js

/*
 * Used via https://chrome.google.com/webstore/detail/user-javascript-and-css/nbhcbdghjpllgmfilhnhkllmkecfmpld
 * to embed JS in all web-pages that are compliant to enable keyboard-navigation of blog posts
 */
(function() {
  window.addEventListener('keydown', function(e) {
    switch(e.key) {
      case 'Left': // IE11 BS
      case 'ArrowLeft':
        var link = document.querySelector('a[rel="prev"], .prev, #previtem');
        if(link) { link.click(); }
        break;
      case 'Right': // IE11 BS
      case 'ArrowRight':
        var link = document.querySelector('a[rel="next"], .next, #nextitem');
        if(link) { link.click(); }
        break;
    }
  });
})();