Add anchor links to headings

Make every title a clickable anchor.

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Add anchor links to headings
// @namespace    http://tampermonkey.net/
// @version      0.9
// @description  Make every title a clickable anchor.
// @author       Beerbeisser
// @match        *://*/*
// @grant        none
// @license      MIT
// ==/UserScript==

(function() {
  'use strict';
  const headings = document.querySelectorAll('h1, h2, h3, h4, h5, h6');
  headings.forEach((heading) => {
    if (!heading.querySelector('a[href]') && !heading.closest('a[href]')) {
      const title = heading.textContent.trim().toLowerCase().replace(/\s+/g, '-');
      const anchor = document.createElement('a');
      anchor.href = `#${title}`;
      anchor.id = title;
      anchor.style.color = 'inherit'; // inherit the color of the parent element
      anchor.style.textDecoration = 'none'; // prevent underline
      anchor.textContent = heading.textContent;
      heading.innerHTML = '';
      heading.appendChild(anchor);
    }
  });
})();