osu! - Remove difficulty badge

Removes the difficulty badge element on osu! pages
줄 바꿈
// ==UserScript==
// @name         osu! - Remove difficulty badge
// @namespace    https://osu.ppy.sh/
// @version      1.0
// @description  Removes the difficulty badge element on osu! pages
// @author       you
// @match        https://osu.ppy.sh/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function () {
    'use strict';

    const SELECTOR = '.difficulty-badge--beatmapset';

    function removeTargets(root = document) {
        const elements = root.querySelectorAll(SELECTOR);
        elements.forEach(el => el.remove());
    }

    removeTargets();

    const observer = new MutationObserver((mutations) => {
        for (const mutation of mutations) {
            if (mutation.addedNodes.length === 0) continue;

            for (const node of mutation.addedNodes) {
                if (node.nodeType !== 1) continue;

                if (node.matches && node.matches(SELECTOR)) {
                    node.remove();
                    continue;
                }

                if (node.querySelectorAll) {
                    removeTargets(node);
                }
            }
        }
    });

    function startObserving() {
        observer.observe(document.documentElement, {
            childList: true,
            subtree: true,
        });
    }

    if (document.documentElement) {
        startObserving();
    } else {
        document.addEventListener('DOMContentLoaded', startObserving);
    }
})();