Question

如何遍历特定div标签中的所有标头标签？我正在尝试自动在div标签中创建所有内容的文档结构树并将其放置在侧边栏菜单中...如果有易于使用的javascript库...我也希望采用这种方法，因为那样我就不会不需要编写任何JavaScript代码...

$( document ).ready( readyFn );

function readyFn( jQuery ) {
    //alert("hey!");
    var docmap = $("#docmap");
    var body   = $("#body");
    docmap.append('<br>Some new content!');
	
    var all = body.getElementsByTagName("h1, h2, h3, h4, h5, h6");

    for (var i=0, max=all.length; i < max; i++) {
        docmap.append(all[i].innerHtml);
    }		
}

#docmap {
  background-color: #f0f0f0;
  height: 100%;
  width: 200px;
  position: fixed; 
}
#main {
  margin-left: 200px;
  position: 200px; 
  padding: 20px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<div id="docmap">
   <ul>
      <li> hello
      <li> hi
      <li> howdy
   </ul>
</div>
<div id="main">
   <h1>header1</h1>
   <h2>header2 a</h2>
   <h2>header2 b</h2>
   <h1>header1 a</h1>
</div>

Answer 1

使用find获取元素，然后在它们上循环。

$( document ).ready( readyFn );

function readyFn( $ ) {
    var docmap = $("#docmap");
    var body   = $("#body");
    docmap.append('<br>Some new content!');
	
    var all = body.find("h1, h2, h3, h4, h5, h6");
    
    all.each(function(){
      docmap.append(this.innerHTML);
    });
}

#docmap {
  background-color: #f0f0f0;
  height: 100%;
  width: 200px;
  position: fixed; 
}
#main {
  margin-left: 200px;
  position: 200px; 
  padding: 20px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<div id="docmap">
   <ul>
      <li> hello
      <li> hi
      <li> howdy
   </ul>
</div>
<div id="main">
   <h1>header1</h1>
   <h2>header2 a</h2>
   <h2>header2 b</h2>
   <h1>header1 a</h1>
</div>

如何遍历特定div标签中的所有标头标签？

1 个答案: