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kirillorgazm / PW (pw.mail.ru) cabinet promo items multi-selection

// ==UserScript==
// @name         PW (pw.mail.ru) cabinet promo items multi-selection
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Select all items in promo-items page (not only 6)
// @author       You
// @match        https://chrome.google.com/webstore/detail/tampermonkey/dhdgffkkebhmkfjojejmpbldmpobfkfo
// @icon         https://www.google.com/s2/favicons?domain=google.com
// @grant        none
// @license     MIT
// @include     https://pw.mail.ru/promo_items.php
// @updateURL   https://openuserjs.org/meta/kirillorgazm/PW_(pw.mail.ru)_cabinet_promo_items_multi-selection.meta.js
// @downloadURL https://openuserjs.org/install/kirillorgazm/PW_(pw.mail.ru)_cabinet_promo_items_multi-selection.user.js
// @copyright   2021, kirillorgazm (https://openuserjs.org/users/kirillorgazm)
// ==/UserScript==

(function() {
    'use strict';

    // Your code here...
    $('.items_container input[type=checkbox]').click(function(){
        var n = $(".items_container input:checked").length;
        if(n >= 50) {
            $(".items_container input[type=checkbox]:not(:checked)").attr("disabled", "disabled");
        }
        else {
            $("input[type=checkbox], input[type=submit]").removeAttr("disabled");
        }
    });
    $('.item_input_block').mouseover(function(){
        if($(this).find('input[type=checkbox]:not(:checked)').is(':disabled')){
            $('.descr_block').show();
        }
        else {
            $('.descr_block').hide();
        }
    });
    const items = document.getElementsByName('cart_items[]')
    for (let i = 0; i < items.length; i++) {items[i].click()}

})();