title: How to get data-value, which class="rb-tab-active"
body: <p>I have some question about how to get <code>data-value</code> from <code>&lt;div&gt;</code> if the "class" is "rb-tab-active". </p>
  
  <pre><code>                    &lt;p&gt;B. Demonstrasi&lt;/p&gt;
                      &lt;div class="rb" id="rb-2"&gt;
                        &lt;div class="rb-tab" data-value="1"&gt;
                          &lt;div class="rb-spot"&gt;
                            &lt;span class="rb-txt"&gt;Sangat Besar&lt;/span&gt;
                          &lt;/div&gt;
                        &lt;/div&gt;
                        &lt;div class="rb-tab" data-value="2"&gt;
                          &lt;div class="rb-spot"&gt;
                            &lt;span class="rb-txt"&gt;Besar&lt;/span&gt;
                          &lt;/div&gt;
                        &lt;/div&gt;
                        &lt;div class="rb-tab" data-value="3"&gt;
                          &lt;div class="rb-spot"&gt;
                            &lt;span class="rb-txt"&gt;Cukup Besar&lt;/span&gt;
                          &lt;/div&gt;
                        &lt;/div&gt;
                        &lt;div class="rb-tab" data-value="4"&gt;
                          &lt;div class="rb-spot"&gt;
                            &lt;span class="rb-txt"&gt;Kurang&lt;/span&gt;
                          &lt;/div&gt;
                        &lt;/div&gt;
                        &lt;div class="rb-tab" data-value="5"&gt;
                          &lt;div class="rb-spot"&gt;
                            &lt;span class="rb-txt"&gt;Tidak Sama Sekali&lt;/span&gt;
                          &lt;/div&gt;
                        &lt;/div&gt;
                      &lt;/div&gt;
                      &lt;br&gt;
  </code></pre>