an class="token attr-name">:tabindex</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>currentTab === 1 ? '0' : '-1'<span class="token punctuation">"</span></span><br>      <span class="token punctuation">></span></span><br>        First tab<br>      <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">></span></span><br>    <span class="token tag