我很难得到多个模式，从不同的按钮打开

<button id="modalBtn">打开模态窗口</button>
<button id="tabBtn">打开标签页</button>
<button id="sidebarBtn">打开侧边栏</button>

<div id="modal" style="display:none;">
  <p>这是模态窗口内容</p>
</div>

<div id="tabs" style="display:none;">
  <p>这是标签页内容</p>
</div>

<div id="sidebar" style="display:none;">
  <p>这是侧边栏内容</p>
</div>

document.getElementById('modalBtn').addEventListener('click', function() {
  document.getElementById('modal').style.display = 'block';
});

document.getElementById('tabBtn').addEventListener('click', function() {
  document.getElementById('tabs').style.display = 'block';
});

document.getElementById('sidebarBtn').addEventListener('click', function() {
  document.getElementById('sidebar').style.display = 'block';
});