jQuery 属性选择器

时间:2022-09-28 RiemannHypothesis 人气:0

一、属性选择器

Attribute Selector [name="value"]

选择指定属性是给定值的元素。

attribute: 一个属性名.
value: 一个属性值，可以是一个不带引号的一个单词或带一个引号的字符串。

<!DOCTYPE html>
<html>
<head>
  <script src="./jquery-3.6.0.min.js"></script>
</head>
<body>
  <div>
    <label>
      <input type="radio" name="newsletter" value="name" />
      <span>name</span>
    </label>
  </div>
  <div>
    <label>
      <input type="radio" name="newsletter" value="age" />
      <span>age</span>
    </label>
  </div>
  <div>
    <label>
      <input type="radio" name="newsletter" value="age" />
      <span>sex</span>
    </label>
  </div>
<script>$('input[value="name"]').next().text("username");</script>
</body>
</html>

Attribute Selector [name|="value"]

选择指定属性值等于给定字符串或以该字符串为前缀（该字符串后跟一个连字符“-” ）的元素。

<!DOCTYPE html>
<html>
<head>
  <style>
a { display: inline-block; }
  </style>
  <script src="./jquery-3.6.0.min.js"></script>
</head>
<body>
 
  <a href="example.html" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  hreflang="en">Some text</a> 
 
  <a href="example.html" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  hreflang="en-UK">Some other text</a>
 
  <a href="example.html" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  hreflang="english">will not be outlined</a>
<script>
$('a[hreflang|="en"]').css('border','3px dotted green');
</script>
</body>
</html>

Attribute [name*="value"]

选择指定属性具有包含一个给定的子字符串的元素。（选择给定的属性是以包含某些值的元素）

<!DOCTYPE html>
<html>
<head>
  <script src="./jquery-3.6.0.min.js"></script>
</head>
<body>
  <input name="man-news" />
 
  <input name="milkman" />
  <input name="letterman2" />
  <input name="newmilk" />
<script>$('input[name*="man"]').val('has man in it!');</script>
 
</body>
</html>

Attribute Selector [name~="value"]

选择指定属性用空格分隔的值中包含一个给定值的元素。

<!DOCTYPE html>
<html>
<head>
  <script src="./jquery-3.6.0.min.js"></script>
</head>
<body>
  <input name="man-news" />
 
  <input name="milk man" />
  <input name="letterman2" />
  <input name="newmilk" />
<script>$('input[name~="man"]').val('mr. man is in it!');</script>
 
</body>
</html>

Attribute Selector [name$="value"]

选择指定属性是以给定值结尾的元素。这个比较是区分大小写的。

<!DOCTYPE html>
<html>
<head>
  <script src="./jquery-3.6.0.min.js"></script>
</head>
<body>
  <input name="newsletter" />
 
  <input name="milkman" />
  <input name="jobletter" />
<script>$('input[name$="letter"]').val('a letter');</script>
 
</body>
</html>

Attribute Selector [name^="value"]

选择指定属性是以给定字符串开始的元素：

<!DOCTYPE html>
<html>
<head>
  <script src="./jquery-3.6.0.min.js"></script>
</head>
<body>
  <input name="newsletter" />
 
  <input name="milkman" />
  <input name="newsboy" />
<script>$('input[name^="news"]').val('news here!');</script>
 
</body>
</html>

加载全部内容