userscript-block-duckduckgo-domains.js

// ==UserScript==
// @name         Block domains from duckduckgo
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  A userscript to remove search results from specific domains
// @author       Remi Rampin <remirampin@gmail.com>
// @match        https://duckduckgo.com/*
// ==/UserScript==

// https://gist.github.com/remram44/407be77a5649e2c816064a7ac0132ac0

(function() {
    'use strict';

    let domains = [
        '9to5answer.com',
        'awesomeopensource.com',
        'clariontech.com',
        'educba.com',
        'geeksforgeeks.org',
        'hevodata.com',
        'libhunt.com',
        'stackshare.io',
        'stevehacks.com',
        'trustradius.com',
        'w3schools.blog',
        'w3schools.com',
        'wikidiff.com',
        'kubernetesquestions.com',
    ];

    function filterLinks() {
        if(filterLinks.active) return;
        filterLinks.active = true;
        let ls = document.querySelectorAll('ol.react-results--main > li');
        ls.forEach((l) => {
            for(let a of l.querySelectorAll('a')) {
                for(let d of domains) {
                    if(a.href && a.href.indexOf(d) !== -1) {
                        l.remove();
                        return;
                    }
                }
            }
        });
        filterLinks.active = false;
    }
    filterLinks.active = false;

    function start() {
        let links = document.querySelector('.react-results--main');
        if(links) {
            links.addEventListener('DOMSubtreeModified', filterLinks);
            filterLinks();
        } else {
            setTimeout(start, 500);
        }
    }
    start();
})();