​x
 
<!DOCTYPE html>
<html>
<head>
<style>
a[target=_blank] {
  background-color: yellow;
}
</style>
</head>
<body>
​
<h1>CSS [attribute="value"] 选择器</h1>
<p>target="_blank" 的链接会有黄色背景：</p>
​
<a href="https://www.w3school.org.cn">w3school.org.cn</a>
<a href="http://www.disney.com" target="_blank">disney.com</a>
<a href="http://www.wikipedia.org" target="_top">wikipedia.org</a>
​
</body>
</html>
​