＃登录CSS选择器 [英] # sign in CSS selectors
问题描述
一些CSS选择器在它们前面有＃，这意味着什么？
Some CSS selectors have # in front of them, what does that mean?
推荐答案
这是ID选择器，是CSS标准的基本特征。它根据 id 属性（假设符合文档，当然），将HTML元素与给定的ID匹配。有关详情，请参见 W3C Selectors规范。
It's the ID selector, a fundamental feature of the CSS standard. It matches the HTML element with the given ID, according to the id attribute (assuming a conforming document, of course). See the W3C Selectors spec for more.
<!DOCTYPE html>
<html lang="en">
<head>
<style type="text/css">
#my-div {
color: #f00;
}
</style>
</head>
<body>
<div id="my-div">This text will be red.</div>
<div id="another-div">This text will not be red.</div>
</body>
</html>
您也可能看到＃表示法用在URL片段标识符中以引用命名锚（< a name =some-anchor>< / a> ）。这些还可以指向页面中具有特定ID的元素，就像命名锚点一样，并且我认为这就是为什么CSS在选择ID时使用相同的符号。
You may also have seen the # notation used in a URL fragment identifier to refer to named anchors (<a name="some-anchor"></a>). These can also point to elements with certain IDs in your page, just like named anchors, and I gather that it's why CSS uses the same notation for selecting IDs.
这篇关于＃登录CSS选择器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
