// ==UserScript==// @name         Wiki Sticky Table Headings// @namespace    https://greasyfork.org/en/users/46159-tom-burris2// @version      0.1// @description  Makes table headings stick to the top of the screen on wikipedia// @author       Tom Burris// @match        https://*.wikipedia.org/wiki/*// @grant        none// ==/UserScript==(function() {'use strict';const enableSticky = table => {let ths = table.getElementsByTagName("th");for (const th of ths) {th._bounds = th.getBoundingClientRect();th.style.position = "sticky";th.style.top = `${th._bounds.top - table._bounds.top}px`;}table._isSticky = true;};const disableSticky = table => {let ths = table.getElementsByTagName("th");for (const th of ths) th.style.top = "unset";table._isSticky = false;};const onscroll = event => {let tables = document.getElementsByTagName("table");for (const table of tables) {let bounds = table._bounds = table.getBoundingClientRect();const shouldBeSticky = bounds.top < 0 && -bounds.top < bounds.height;if (shouldBeSticky != table._isSticky)(shouldBeSticky ? enableSticky : disableSticky)(table);}};document.addEventListener("scroll", onscroll);})();