All Selector (“*”)

分类: Selectors > Basic

all selector

描述: 选择所有元素.

  • 添加的版本: 1.0jQuery( "*" )

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。

例子:

Example: 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.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
<!DOCTYPE html>
<html>
<head>
  <style>
  h3 { margin: 0; }
  div,span,p {
    width: 80px;
    height: 40px;
    float:left;
    padding: 10px;
    margin: 10px;
    background-color: #EEEEEE;
  }
  </style>
  <script src="//code.jquery.com/jquery-latest.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>

Demo:

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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
<!DOCTYPE html>
<html>
<head>
  <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="//code.jquery.com/jquery-latest.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>

Demo: