Backup old nav script - refactor or delete

nav.js

function initNavigation(){
  //var docElement = document.documentElement;
  console.log('init navigation');

  var currId,
      idTarget,
      navCurrent,
      buttonOpen = document.querySelectorAll('.js-open-nav'),
      topBar = document.querySelectorAll('.top-bar'),
      topBarNavButton = topBar.querySelectorAll(buttonOpen),
      buttonClose = document.querySelectorAll('.js-close-nav'),
      navClass = '.nav',
      nav = document.querySelectorAll(navClass),
      isOpen = false;

  buttonOpen.addEventListener('click', function (e) {
    idTarget = this.getAttribute('href');
    navCurrent = document.querySelectorAll(navClass + idTarget);
    e.preventDefault();
    fadeOut(topBarNavButton);
    topBar.classList.add('top-bar--active');
    toggleMenu(currId, idTarget);
  });

  buttonClose.addEventListener('click', function (e) {
    //$('body').off('.top-bar--active');
    idTarget = this.getAttribute('href');
    navCurrent = document.querySelectorAll(navClass + idTarget);
    e.preventDefault();
    toggleMenu(currId, idTarget);
  });
}

document.addEventListener('scroll', function() {
  if( isOpen ) {
    //console.log(idTarget);
    toggleMenu(currId, idTarget);
  }
});




/* + Temp */
function fadeOut(el){
  el.style.opacity = 1;

  (function fade() {
    if ((el.style.opacity -= .1) < 0) {
      el.style.display = "none";
    } else {
      requestAnimationFrame(fade);
    }
  })();
}

function fadeIn(el, display){
  el.style.opacity = 0;
  el.style.display = display || "block";

  (function fade() {
    var val = parseFloat(el.style.opacity);
    if (!((val += .1) > 1)) {
      el.style.opacity = val;
      requestAnimationFrame(fade);
    }
  })();
}
/* = Temp */

module.exports = {
  init: initNavigation
};