Question

我需要用盒子中的特性选择器来改变不同肤色和形象的联系,但并不奏效。

我有:

<a href="/manual.pdf">A PDF File</a>

And this css:

a {
     display: block;
     height: 25px;
     padding-left: 25px;
     color:#333;
     font: bold 15px Tahoma;
     text-decoration: none;
 }
 a[href= .pdf ] { background: red; }

Why isn t the background red?

Answer 1

用你手提之后的美元。这将使属性价值与扼杀的结束相吻合。

a[href$= .pdf ] { /*css*/ }

JSFiddle: http://jsfiddle.net/UG9ud/

E[foo]        an E element with a "foo" attribute (CSS 2)
E[foo="bar"]  an E element whose "foo" attribute value is exactly equal to "bar" (CSS 2)
E[foo~="bar"] an E element whose "foo" attribute value is a list of whitespace-separated values, one of which is exactly equal to "bar" (CSS 2)
E[foo^="bar"] an E element whose "foo" attribute value begins exactly with the string "bar" (CSS 3)
E[foo$="bar"] an E element whose "foo" attribute value ends exactly with the string "bar" (CSS 3)
E[foo*="bar"] an E element whose "foo" attribute value contains the substring "bar" (CSS 3)
E[foo|="en"]  an E element whose "foo" attribute has a hyphen-separated list of values beginning (from the left) with "en" (CSS 2)

来源:。

Answer 2

The accepted answer (using a[href$= .pdf ]) assumes that that a link to a pdf will always end with .pdf. That is not necessarily the case, as the link could have a query string or a hash fragment, for example with a UTM tracking code or a page number, in which case those links would not be matched. In fact depending on your application this could be the case for most links.

<a href="/manual.pdf?utm_source=homepage">A PDF File</a>
<a href="/manual.pdf#page=42">A PDF File</a>

如果你想确保你的规则也适用于你可以匹配.pdf的情况。在属地任何地方使用

a[href*= .pdf ]

However this will then match some unlikely but unintended things, such as a subdomain our.pdf.domain.com/a-page. But we can narrow it down further, as we know we would only use it match pdfs that have a query string or hash fragment. If we combine the 3 cases we should match all pdf links.

a[href$= .pdf ], a[href*= .pdf? ], a[href*= .pdf# ] {
    background: red;
}

Answer 3

This should also work:

a[href*= .pdf ] { background: red; }

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