html – CSS属性以插入符号开头

<tr style="^padding-bottom: 10px;">

它们前面带有插入符号的样式不适用.因此,在这种情况下,它可能是一种注释掉CSS样式的方法,而不必使用整个HTML注释.但这不是一种标准的方法.

(Example)

CSS中的插入符号确实有意义,即“开始于”Attribute selector.

它允许您根据属性的值是否以给定字符串开头来定位CSS中的元素.

E[foo]  an E element with a "foo" attribute
E[foo="bar"]    an E element whose "foo" attribute value is exactly equal to "bar"
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"
E[foo^="bar"]   an E element whose "foo" attribute value begins exactly with the String "bar"
E[foo$="bar"]   an E element whose "foo" attribute value ends exactly with the String "bar"
E[foo*="bar"]   an E element whose "foo" attribute value contains the subString "bar"

但是,在您的情况下,插入符号不能用作选择器.