Cancelence

AtCoderのコンテストのカスタムCSSを無効化します

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Cancelence
// @namespace    https://atcoder.jp
// @version      0.1
// @description  AtCoderのコンテストのカスタムCSSを無効化します
// @author       Yukkku
// @match        https://atcoder.jp/contests/*/*
// @icon         https://atcoder.jp/favicon.ico
// @run-at       document-start
// @license      MIT
// ==/UserScript==

(() => {
    'use strict';
    const d = ()=>{
        const v = document.querySelector('head>style:first-of-type');
        if (v) {
            v.innerHTML = '';
            observer.disconnect();
        }
    };
    d();
    const observer = new MutationObserver(d);
    observer.observe(document.documentElement ,{ attributes: true, childList: true, subtree: true });
    addEventListener('DOMContentLoaded', () => {
        observer.disconnect();
    });
})();