利用hidden 属性隐藏显示元素

html

<button onclick="toggleHidden()">toggle</button>
<table>
  <tr>
    <th>Name</th>
</tr>
  <tr>
    <td>Adam</td>
    <td>London</td>
</tr>
  <tr id="toggle" hidden>
    <td>Joe</td>
    <td>New</td>
</tr>
  <tr>
    <td>Anne</td>
    <td>Paries</td>
</tr>

</table>

js

    <script>
    var toggleHidden=function(){
      var elem = document.getElementById('toggle');
      if(elem.hasAttribute('hidden)){
        elem.removeAttribute('hidden')
}else{
  elem.setAttribute('hidden','hidden')
}
}

</script>