Adds the ability to use arrow keys to move to the next or previous comic/article on xkcd.com.
// ==UserScript==
// @name xkcd Arrow Keys
// @description Adds the ability to use arrow keys to move to the next or previous comic/article on xkcd.com.
// @namespace https://greasyfork.org/en/users/2556-pietu1998
// @include http://xkcd.com/*
// @include https://xkcd.com/*
// @include http://*.xkcd.com/*
// @include https://*.xkcd.com/*
// @version 1.2.1
// @grant none
// ==/UserScript==
window.addEventListener("keydown", function(e) {
var q = document.querySelector.bind(document);
var el = false;
if (e.keyCode == 37)
el = q("a[rel=prev]") || q("li.nav-prev a");
if (e.keyCode == 39)
el = q("a[rel=next]") || q("li.nav-next a");
el && el.click();
});