Disable user-select CSS on pianoweb.fr

Disable user-select:none; CSS on pianoweb.fr

// ==UserScript==
// @name         Disable user-select CSS on pianoweb.fr
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  Disable user-select:none; CSS on pianoweb.fr
// @author       You
// @match        https://www.pianoweb.fr/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    window.addEventListener('load', function() {
        var styleSheets = document.styleSheets;
        for (var i = 0; i < styleSheets.length; i++) {
            var rules = styleSheets[i].cssRules;
            if (rules) {
                for (var j = 0; j < rules.length; j++) {
                    var rule = rules[j];
                    if (rule.selectorText) {
                        rule.style.userSelect = 'auto';
                    }
                }
            }
        }
})})();