app.js

/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
var firmwarewizard = function() {
  var app = {};

  // helper functions
  function $(s) {
    return document.querySelector(s);
  }

  function toggleClass(e, cssClass) {
    setClass(e, cssClass, !hasClass(e, cssClass));
  }

  function hasClass(e, cssClass) {
    var searchstring = (' ' + e.className + ' ').replace(/[\n\t]/g, " ");
    return (searchstring.indexOf(' ' + cssClass+ ' ') !== -1);
  }

  function setClass(e, cssClass, active) {
    if (active && !hasClass(e, cssClass)) {
      e.className = (e.className+' '+cssClass).trim();
    } else if (!active && hasClass(e, cssClass)) {
      e.className = e.className.replace(cssClass, '');
    }
  }

  function show_inline(s) {
    $(s).style.display = 'inline-block';
  }

  function show_block(s) {
    $(s).style.display = 'block';
  }

  function hide(s) {
    $(s).style.display = 'none';
  }

  // Object.values() replacement
  function ObjectValues(obj) {
    return Object.keys(obj).map(function(key) { return obj[key]; });
  }

  function isEmptyObject(obj) {
      for (var name in obj) {
          return false;
      }
      return true;
  }

  function scrollDown() {
    try {
      window.scrollBy({
        top: 512,
        left: 0,
        behavior: 'smooth'
      });