module pattern - self invoced function

index.js

    var myModule = {
        animals: ['dog', 'cat', 'bird'],
        addNewElement: function (newAnimal) {
            var elementToAdd;
            if (typeof newAnimal !== 'string') {
                elementToAdd = document.querySelector('#animal').value();
            } else {
                elementToAdd = newAnimal;
            }

            if (elementToAdd !== '') {
                this.animals.push(elementToAdd);
            }
        },
        displayList: function () {
            var list = document.querySelector('#list');
            if (list == null) {
                list = document.createElement('ul');
                list.id = list;
                document.querySelector('body').appendChild(list);
            }
            list.innerHTML = '';
            this.animals.forEach(function (el, i) {
                var element = document.createElement('li');
                element.innerHTML = el;
                list.appendChild(element);
            });
        },
        bindEvents : function () {
            document.querySelector('#number').addEventListener('click', addNewElement.bind(this));
            document.querySelector('#show').addEventListener('click', displayList.bind(this));
        },
        init: function () {
            bindEvents();
            displayList();
        }
    }