black out words that stress you out

blackout.js

// ==UserScript==
// @name         Text Blackout (Efficient)
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Efficiently blacks out text segments from the array "a" on every page
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // Array of text segments to black out
    var a = ["rape", "rapist"];

    // Create a regular expression from the array
    var regex = new RegExp("(" + a.join("|") + ")", "gi");

    // Function to black out text segments
    function blackoutText(textNode) {
        var text = textNode.textContent;
        var matches = text.match(regex);

        if (matches) {
            var fragment = document.createDocumentFragment();
            var startIndex = 0;

            matches.forEach(function(match) {
                var index = text.indexOf(match, startIndex);
                if (index > startIndex) {
                    fragment.appendChild(document.createTextNode(text.slice(startIndex, index)));
                }
                var span = document.createElement('span');
                span.style.backgroundColor = 'black';
                span.style.color = 'black';
                span.textContent = match;
                fragment.appendChild(span);
                startIndex = index + match.length;
            });

            if (startIndex < text.length) {
                fragment.appendChild(document.createTextNode(text.slice(startIndex)));
            }

            textNode.parentNode.replaceChild(fragment, textNode);
        }
    }

    // Function to process text nodes efficiently
    function processTextNodes(node) {
        var walker = document.createTreeWalker(node, NodeFilter.SHOW_TEXT, null, false);
        var textNodes = [];

        while (walker.nextNode()) {
            textNodes.push(walker.currentNode);
        }

        textNodes.forEach(blackoutText);
    }

    // Function to run the script periodically
    function runScript() {
        processTextNodes(document.body);
    }

    // Run the script initially
    runScript();

    // Set an interval to run the script every 10 seconds
    setInterval(runScript, 1000);
})();