Facebook Adblocker

Chặn quảng cáo được tài trợ trên trang chủ Facebook.
Truy cập trang web của tác giả để được hỗ trợ, đặt câu hỏi, đăng đánh giá hoặc báo cáo tập lệnh.
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// ==UserScript==
// @name            Facebook Adblocker
// @name:vi         Facebook Adblocker
// @namespace       https://lelinhtinh.github.io
// @description     Block all ads in Facebook News Feed.
// @description:vi  Chặn quảng cáo được tài trợ trên trang chủ Facebook.
// @version         1.4.6
// @icon            https://i.imgur.com/F8ai0jB.png
// @author          lelinhtinh
// @oujs:author     baivong
// @license         MIT; https://baivong.mit-license.org/license.txt
// @match           https://facebook.com/*
// @match           https://*.facebook.com/*
// @require         https://unpkg.com/[email protected]/umd/index.js
// @noframes
// @supportURL      https://github.com/lelinhtinh/Userscript/issues
// @run-at          document-idle
// @grant           none
// ==/UserScript==

/**
 * Facebook sponsor labels
 */
const sponsorLabelConfigs = {
  en: ['Sponsored'],
  vi: ['Được tài trợ'],
};

/**
 * @type {'remove'|'fade'}
 */
const sponsorHideMode = 'remove';

/* === DO NOT CHANGE ANYTHING BELOW THIS LINE === */

(function () {
  'use strict';

  /** @type Element */
  let labelHidden = null;
  /** @type string[]|null */
  let labelStore = null;
  /** @type MutationObserver */
  let observerLabel;
  /** @type MutationObserver */
  let observerStory;
  /** @type MutationObserver */
  let observerHead;
  /** @type IntersectionObserver */
  let observerScroll;

  let sponsorLangConfigs =
    sponsorLabelConfigs[navigator.language.split('-')[0] || document.documentElement.lang || sponsorLabelConfigs.en];
  /**
   * @param {string} label
   * @param {boolean} removeSpaces
   * @returns {boolean}
   */
  const isSponsorLabel = (label, removeSpaces = false) => {
    if (!removeSpaces) return sponsorLangConfigs.includes(label);
    return sponsorLangConfigs.map((label) => label.replace(/\s/g, '')).includes(label);
  };

  const feedSelector = () => (location.pathname.startsWith('/watch') ? '#watch_feed' : '[role="feed"]');
  const articleSelector = () => (location.pathname.startsWith('/watch') ? '._6x84' : '[role="article"]');

  /**
   * @param {Element} sponsorLabel
   */
  const removeSponsor = (sponsorLabel) => {
    const sponsorWrapper = sponsorLabel.closest(articleSelector());
    if (sponsorWrapper === null) return;
    console.count('UserScript Facebook Adblocker');

    if (sponsorHideMode === 'fade') {
      sponsorWrapper.style.opacity = 0.1;
      sponsorWrapper.style.transition = 'opacity 400ms ease-in-out 0s';
      sponsorWrapper.addEventListener('mouseenter', () => {
        sponsorWrapper.style.opacity = 1;
      });
      sponsorWrapper.addEventListener('mouseleave', () => {
        sponsorWrapper.style.opacity = 0.1;
      });
    } else {
      sponsorWrapper.remove();
    }
  };

  /**
   * @param {Element} wrapper
   */
  const detectSponsor = (wrapper) => {
    let sponsorLabelSelector = ['a[href^="/ads/"]'];
    sponsorLabelSelector.push(...sponsorLangConfigs.map((label) => `a[aria-label="${label}"]`));

    const sponsorLabels = wrapper.querySelectorAll(sponsorLabelSelector.join(','));
    if (sponsorLabels.length) sponsorLabels.forEach(removeSponsor);

    const obfuscatedLabels = wrapper.querySelectorAll('[style="display: flex;"]');
    if (obfuscatedLabels.length) {
      obfuscatedLabels.forEach((obfuscatedLabel) => {
        const temp = [];
        obfuscatedLabel.querySelectorAll('div').forEach((span) => {
          if (
            getComputedStyle(span).getPropertyValue('display') === 'none' ||
            getComputedStyle(span).getPropertyValue('position') === 'absolute'
          )
            return;

          const order = parseInt(getComputedStyle(span).getPropertyValue('order'), 10);
          temp[order] = span.textContent.trim();
        });

        const label = temp.join('').replace(/\s/g, '');
        if (isSponsorLabel(label, true)) removeSponsor(obfuscatedLabel);
      });
    }
  };

  /**
   * @param {Element} wrapper
   */
  const findSponsor = (wrapper = document) => {
    if (labelStore instanceof Array) {
      if (!labelStore.length) return;
      const labelId = labelStore.pop();

      const sponsorLabel = wrapper.querySelector('span[aria-labelledby="' + labelId + '"][class]');
      if (sponsorLabel === null) return;

      removeSponsor(sponsorLabel);
      findSponsor(wrapper);
    }

    detectSponsor(wrapper);
  };

  /**
   * @param {Element} labelHidden
   */
  const watchLabel = (labelHidden) => {
    if (observerLabel) return;
    observerLabel = new MutationObserver((mutationsList) => {
      for (let mutation of mutationsList) {
        if (
          mutation.type === 'attributes' &&
          mutation.attributeName === 'id' &&
          isSponsorLabel(mutation.target.textContent.trim())
        ) {
          labelStore.push(mutation.target.id);
          findSponsor();
        }
      }
    });
    observerLabel.observe(labelHidden, {
      attributes: true,
      attributeFilter: ['id'],
      subtree: true,
    });
  };

  // Find while scrolling
  observerScroll = new IntersectionObserver((entries) => {
    entries.forEach((entry) => {
      if (!entry.intersectionRatio) return;
      detectSponsor(entry.target);
    });
  });

  const init = throttleDebounce.debounce(300, () => {
    const newsFeed = document.querySelector(feedSelector());
    if (newsFeed === null) return;

    newsFeed.querySelectorAll(articleSelector()).forEach((article) => {
      observerScroll.observe(article);
    });

    // Find on DOM change
    if (observerStory) observerStory.disconnect();
    observerStory = new MutationObserver((mutationsList) => {
      for (let mutation of mutationsList) {
        findSponsor(mutation.target);
        mutation.target.querySelectorAll(articleSelector()).forEach((article) => {
          observerScroll.observe(article);
        });
      }
    });
    observerStory.observe(newsFeed, {
      attributes: false,
      childList: true,
      subtree: true,
    });
    findSponsor();

    // Find on label list change
    if (labelHidden === null) {
      labelHidden = document.querySelector('[hidden="true"]');
      if (labelHidden === null) {
        labelStore = null;
        if (observerLabel) {
          observerLabel.disconnect();
          observerLabel = null;
        }
      } else {
        labelStore = [];
        labelHidden.querySelectorAll('span').forEach((target) => {
          if (isSponsorLabel(target.textContent.trim())) {
            labelStore.push(target.id);
            findSponsor();
          }
        });
        watchLabel(labelHidden);
      }
    }
  });
  init();

  if (observerHead) observerHead.disconnect();
  observerHead = new MutationObserver(init);
  observerHead.observe(document.head, {
    attributes: true,
    childList: true,
    subtree: true,
  });

  (function (old) {
    window.history.pushState = function () {
      old.apply(window.history, arguments);
      init();
    };
  })(window.history.pushState);
})();