append

This method can be used to append an element or HTML string to the end of each element in the collection.

// Append an element to the elements
append: function(element) {
  this.elements.forEach(function(el) {
    el.appendChild(element);
  });
  return this;
},
 
// Append an HTML string to the elements
append: function(html) {
  this.elements.forEach(function(el) {
    el.innerHTML += html;
  });
  return this;
}

After Before