*

概述 all selector

返回值：Array<Element(s)>

匹配所有元素

多用于结合上下文来搜索。

警告：除非被它自己使用，否则 * 选择器或通用选择器，其速度是极其慢的。

示例

实例

找到每一个元素

HTML 代码:

<div>DIV</div>
<span>SPAN</span>
<p>P</p>

jQuery 代码:

$("*")

结果:

[ <div>DIV</div>, <span>SPAN</span>, <p>P</p> ]

实例

查找文档中的每一个元素（包括 head, body 等）。 Note that if your browser has an extension/add-on enabled that inserts a <script> or <link> element into the DOM, that element will be counted as well.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>all demo</title>
  <style>
  h3 {
    margin: 0;
  }
  div, span, p {
    width: 80px;
    height: 40px;
    float: left;
    padding: 10px;
    margin: 10px;
    background-color: #EEEEEE;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div>DIV</div>
<span>SPAN</span>
<p>P <button>Button</button></p>
 
<script>
var elementCount = $( "*" ).css( "border", "3px solid red" ).length;
$( "body" ).prepend( "<h3>" + elementCount + " elements found</h3>" );
</script>
 
</body>
</html>

运行一下

实例

查找document.body的所有元素所以像head，script等元素被排除在外。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>all demo</title>
  <style>
  h3 {
    margin: 0;
  }
  div, span, p {
    width: 80px;
    height: 40px;
    float: left;
    padding: 10px;
    margin: 10px;
    background-color: #EEEEEE;
  }
  #test {
    width: auto;
    height: auto;
    background-color: transparent;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div id="test">
  <div>DIV</div>
  <span>SPAN</span>
  <p>P <button>Button</button></p>
</div>
 
<script>
var elementCount = $( "#test" ).find( "*" ).css( "border", "3px solid red" ).length;
$( "body" ).prepend( "<h3>" + elementCount + " elements found</h3>" );
</script>
 
</body>
</html>

运行一下