Chặn quảng cáo fb dạng Được tài trợ

// ==UserScript==
// @name         block ads fb
// @namespace    block ads fb
// @version      1
// @description  block ads fb
// @author       NguyenKhong
// @include      https://www.facebook.com/*
// @grant        unsafeWindow
// @run-at       document-start
// ==/UserScript==

unsafeWindow.document.addEventListener('DOMContentLoaded', function(){
    function searchNodeAds(node){
        if (node && node.attributes.hasOwnProperty("role") && node.attributes.role.textContent === "feed" ){
            let subNodes = node.querySelectorAll("div[data-pagelet]");
            for(let i = 0; i < subNodes.length; i++){
                if(subNodes[i].textContent.substr(0, 512).indexOf("Được tài trợ") > -1){
                    subNodes[i].remove();
                }
            }
        }
        return;
    }

    (function injectMutationObserver () {
        var mutationObserver = new MutationObserver(function(mutations) {
            mutations.forEach(function(mutation) {
                switch (mutation.type) {
                    case "childList":
                        // auto redirect tag a
                        searchNodeAds(mutation.target);
                        return;
                    /*
                    case "attributes":
                        // auto click button
                        if (mutation.target.tagName === "VIDEO" && mutation.attributeName === "src"){
                            //console.log("attributes", mutation);
                            buildMenu(mutation.target);
                        }
                        return;
                        */
                }
            });
        });
        mutationObserver.observe(unsafeWindow.document.body, {
            attributes: false,
            characterData: false,
            childList: true,
            subtree: true,
            attributeOldValue: false,
            characterDataOldValue: false
        });
    })();
});