title: Using " and ' in javascript
body: <p>I'm creating a class dinamically.But now when I try to use I cant seem the find a correct way to place the <code>' and "</code>;</p>
  
  <pre><code>$('.modal-content').append('&lt;div class="modal-body step-' + key + '" data-step="'+key+'"&gt;&lt;/div&gt;');
  
  
  $("modal-body step-' + key").append(input);
  </code></pre>
  
  <blockquote>
    <p>unexpected token</p>
  </blockquote>