toggle button jquery + js module

togglebutton.js

// jquery

var allToggleContents = $('.toggle_content').hide();

$('.toggle_handler').click(function() {
  toggleControl($(this));
});

function toggleControl(button) {
    var container = $("#"+button.attr('aria-controls'));
    //console.log(container);
    if ( container.attr('aria-expanded')=='true' ) {
        button.attr( 'aria-expanded', 'false' );
        container.attr( 'aria-expanded', 'false' );
        container.slideUp();
    } else {
        button.attr( 'aria-expanded', 'true' );
        container.attr( 'aria-expanded', 'true' );
        container.slideDown();
    }
    return false;
}

// js - module pattern - self starting

var Toggler = (function() {

    var plugin = {};

    plugin.init = function() {
        document.querySelectorAll('[data-toggler]').forEach(function (el) {
            //console.log(el.dataset.toggler);
            plugin[el.dataset.toggler](el);
        })
    };

    plugin.toggle = function(button) {
        button.addEventListener('click', function(){
            // control by ID of target element  
            let container = document.getElementById(button.getAttribute('aria-controls'));
            //console.log(container);

            if (container.getAttribute('aria-expanded') === 'true') {
                button.setAttribute( 'aria-expanded', 'false' );
                container.setAttribute( 'aria-expanded', 'false' );
            } else {
                button.setAttribute( 'aria-expanded', 'true' );
                container.setAttribute( 'aria-expanded', 'true' );
            }
        });
    };

    return {
        init: plugin.init
    };

}());

Toggler.init();

// es6
const Toggler = () => {

  const toggle = (button) => {
    button.addEventListener('click', function(){
      // control by ID of target element
      let container = document.getElementById(button.getAttribute('aria-controls'));

      if (container.getAttribute('aria-expanded') === 'true') {
        button.setAttribute( 'aria-expanded', 'false' );
        container.setAttribute( 'aria-expanded', 'false' );
      } else {
        button.setAttribute( 'aria-expanded', 'true' );
        container.setAttribute( 'aria-expanded', 'true' );
      }
    });
  };

  document.querySelectorAll('[data-toggler]').forEach((el) => {
    toggle(el);
  });
};

Toggler();