Adds cards to a single collection

NSMassCollectionAdd

// ==UserScript==
// @name         NSMassCollectionAdd
// @namespace    sitethiefs-ns-scripts
// @version      0.2
// @description  Adds cards to a single collection
// @author       Sitehief of Vylixan
// @match        *www.nationstates.net/page=deck
// @match        *www.nationstates.net/page=deck*
// @match        *www.nationstates.net/*/page=deck*
// @match        *www.nationstates.net/*/page=deck
// @grant        none
// @require      https://craig.global.ssl.fastly.net/js/mousetrap/mousetrap.min.js?a4098
// ==/UserScript==
/*
 * Keybinds:
 * [v] for add and save / go to next page
 */
(function() {
    'use strict';

    function noinput_mousetrap(event) {
        if (event.target.classList.contains("mousetrap")) {
            event.preventDefault();
            event.stopPropagation();
        }
    }

    if (window.location.href.includes('collection=')) {
        Mousetrap.bind(['v'], function(ev) {
            noinput_mousetrap(ev);
            let checkboxes = document.querySelectorAll('input:not(:checked):not([name="autologin"])[type="checkbox"]');
            if (checkboxes.length) {
                let saveButton = document.querySelector("button.approve[name='save_collection']");

                checkboxes.forEach(function (checkbox) {
                    checkbox.click();
                });
                saveButton.click();
            } else if (!checkboxes.length) {
                let nextArrows = document.querySelectorAll('a.pagpage-arrow');
                let lastArrow = nextArrows[nextArrows.length - 1];
                if (lastArrow.innerHTML === '»') {
                    lastArrow.click();
                }
            }
        });
    }
})();