BraveSearchPlus/BraveSearchPlus.user.js

// ==UserScript==
// @name         Brave Search Plus
// @namespace    https://ikibani.com
// @version      0.1
// @description  Supercharge the Brave search engine.
// @author       afycyro
// @match        https://search.brave.com/
// @match        https://search.brave.com/search?q=*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=brave.com
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    let search = {
        origTerms: "",
        terms: "",
        exclude: [],
    }

    const searchBox = document.querySelector('input#searchbox');

    document.querySelector('form.form').addEventListener('submit', () => {
        let searchValue = searchBox.value.trim();
        search.origTerms = searchValue;
        searchValue = searchValue.toLowerCase().split(' ').filter(t => !t.startsWith('-')).join(' ');

        search.exclude = searchBox.value.split(' ').filter(term => term.startsWith('-')).map(term => term.slice(1));
        search.terms = searchValue;
        window.localStorage.setItem('searchOptions', JSON.stringify(search));
        searchBox.value = search.terms;

        return true;
    });

    if (window.location.href.split('/').filter(c => !!c).length > 2) {
        search = JSON.parse(window.localStorage.getItem('searchOptions'));
        searchBox.value = search.origTerms;
        document.querySelector('head title').innerText = `${search.origTerms} - Brave Search`
        const results = document.querySelectorAll('.snippet.fdb');
        for (let result of results) {
            let resultLoc = result.querySelector('.netloc');
            for (let exclusion of search.exclude) {
                if (resultLoc.innerText.toLowerCase().includes(exclusion)) {
                    result.style.display = 'none';
                }
            }
        };
    }
})();