Remove !DHLDROP

remove_dhldrop.user.js

// ==UserScript==
// @name         remove dhldrop messages
// @match        https://www.twitch.tv/*
// @match        https://dashboard.twitch.tv/*
// @run-at       document-start
// @grant        none
// ==/UserScript==

(function () {
  const blocked = new Set([
    "!DHLDROP"
  ]);

  const MESSAGE_SELECTOR =
    '[data-a-target="chat-line-message"], .chat-line__message';

  function getMessageText(line) {
    const msg = line.querySelector('[data-a-target="chat-message-text"]');
    if (msg) return msg.textContent.trim();

    return line.textContent.trim();
  }

  function findSafeWrapper(line, blockedText) {
    let best = line;
    let el = line;

    for (let i = 0; i < 5; i++) {
      if (!el.parentElement) break;

      const parent = el.parentElement;
      const rect = parent.getBoundingClientRect();
      const messageCount = parent.querySelectorAll(MESSAGE_SELECTOR).length;
      const text = parent.textContent || "";

      // HARD safety checks: don't ever hide the whole chat panel
      if (messageCount > 1) break;
      if (rect.height > 180) break;
      if (!text.includes(blockedText)) break;

      best = parent;
      el = parent;
    }

    return best;
  }

  function cleanChat() {
    document.querySelectorAll(MESSAGE_SELECTOR).forEach(line => {
      const text = getMessageText(line);

      if (blocked.has(text)) {
        const wrapper = findSafeWrapper(line, text);

        console.log("[TwitchBlocker] hiding:", text, wrapper);

        // hide instead of remove, safer
        wrapper.style.display = "none";
      }
    });
  }

  const observer = new MutationObserver(cleanChat);

  function start() {
    observer.observe(document.documentElement, {
      childList: true,
      subtree: true
    });

    cleanChat();
    setInterval(cleanChat, 1000);
  }

  if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", start);
  } else {
    start();
  }
})();