an class="p">,</span> <span class="kd">function</span><span class="p">(</span><span class="nx">event</span><span class="p">){</span>
  <span class="kd">let</span> <span class="nx">$myTab</span> <span class="o">=</span> <span class="k">this</span><span class="p">,</span> <span class="nx">$pane</span> <span class="o">=</span> <span class="nx">event</span><span class="p">.</span><span class="nx">tartet</span><span class="p">,</span> <span class="nx">index</span> <span class="o">=</span> <span class="nx">event<