Attribute Contains Prefix Selector [name|="value"]
jQuery('')attribute
An attribute name.
attribute：属性名称
value
An attribute value. Can be either an unquoted single word or a quoted string.
value：属性值。引号是可选的。
Description: Selects elements that have the specified attribute with a value either equal to a given string or starting with that string followed by a hyphen
描述：选择指定属性的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。
(-).
This selector was introduced into the CSS specification to handle language attributes.
Example:
Finds all links with an hreflang attribute that is english.
例子：查找所有hreflang属性为english的链接。
<!DOCTYPE html>
<html>
<head>
<style>
a { display: inline-block; }
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<a href="example.html" hreflang="en">Some text</a>
<a href="example.html" hreflang="en-UK">Some other text</a>
<a href="example.html" hreflang="english">will not be outlined</a>
<script>
$('a').css('border','3px dotted green');
</script>
</body>
</html>
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