Hide Facebook sponsored stories

no-sponsor.js

// ==UserScript==
// @name         No sponsor
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Hide Facebook sponsored stories
// @author       You
// @match        https://www.facebook.com/
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function getLabel(elem) {
        // get visible letters from the subtitle
        return Array.from(elem.querySelectorAll("[data-content]")).filter(e => e.offsetWidth > 0).map(e => e.dataset.content).join("");
    }

    function getSubtitle(elem) {
        return elem.querySelector("[data-testid=fb-test-id-feed-sub-tilte]");
    }

    function getTitle(elem) {
        const e = elem.querySelector("h5");
        return e ? e.innerText : "";
    }

    function getStories() {
        return document.querySelectorAll("[data-testid=fbfeed_story]");
    }

    function hideSponsored() {
        const stories = getStories();
        stories.forEach(story => {
            if (story.__checked__) return;
            const sub = getSubtitle(story);
            if (sub) {
                const title = getTitle(story);
                const label = getLabel(sub);
                if (label == "") return;
                console.log('STORY', title, label);
                if (label.startsWith("Sponsor")) {
                    story.style.display = 'none';
                }
            }
            story.__checked__ = true;
        });
    }

    setInterval(() => hideSponsored(), 2000);
})();