reddit tweaks

Show absolute time next to relative time on Reddit posts and comments
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// ==UserScript==
// @name         reddit tweaks
// @namespace    RedditTweaks
// @version      1.0.0
// @description  Show absolute time next to relative time on Reddit posts and comments 
// @author       [email protected]
// @match        https://www.reddit.com/*
// @grant        none
// @license MIT
// ==/UserScript==

(function () {
  'use strict';

  function updateTimestamps() {
    const times = document.querySelectorAll("time");

    times.forEach((timeEl) => {
      // Avoid duplicating the absolute time
      if (timeEl.dataset.absoluteShown) return;

      const absoluteTime = timeEl.getAttribute("datetime");
      if (absoluteTime) {
        // Format the absolute time
        const date = new Date(absoluteTime);
        //const formatted = date.toLocaleString(); // Local user format
        let formatted = new Date(date.getTime() - (new Date().getTimezoneOffset() * 60000)).toISOString().slice(0,16).replace('T', ' ');
        if(formatted.slice(0,4) === new Date().toLocaleDateString().slice(-4)){
           formatted = formatted.slice(5);
        }

        // Append absolute time in parentheses
        timeEl.textContent += ` (${formatted})`;
        timeEl.dataset.absoluteShown = "true";
      }
    });
  }

  // Initial call
  updateTimestamps();

  // Observe dynamically loaded content (React-based site)
  const observer = new MutationObserver(updateTimestamps);
  observer.observe(document.body, { childList: true, subtree: true });
})();