<string> - CSS（层叠样式表）编辑

在CSS中，<string> 是用来表示一串字符的数据类型，它被用在众多CSS属性中，例如content、font-family、和quotes。

使用规则

<string> 数据类型是由包含在英文双引号（"）或英文单引号（'）中的任意数量的Unicode字符组成。

需要注意的是，在使用某些特殊字符时需要在前面加上反斜线来转义，包括但不限于在双引号字符串中使用双引号字符，在单引号字符串中使用单引号字符，以及反斜线字符，比如\\表示一个反斜线字符。

当你想换行的时候，必须使用像\A或者\00000A这样的换行符。不过在你的代码中，可以通过在每行末尾增加一个反斜线（\）的方式来创建一个多行的字符串。

注意: CSS<string>中不能使用像 或者—这样的实体。

例子

/* Simple strings */
"This string is demarkated by double quotes."
'This string is demarkated by single quotes.'

/* Character escaping */
"This is a string with \" an escaped double quote."
"This string also has \22 an escaped double quote."
'This is a string with \' an escaped single quote.'
'This string also has \27 an escaped single quote.'
"This is a string with \\ an escaped backslash."

/* New line in a string */
"This string has a \Aline break in it."

/* String spanning two lines of code (these two strings will have identical output) */
"A really long \
awesome string"
"A really long awesome string"

规范

Specification	Status	Comment
CSS Values and Units Module Level 3 <string>	Candidate Recommendation	No significant change from CSS Level 2 (Revision 1).
CSS Level 2 (Revision 1) <string>	Recommendation	Explicit definition; allows 6-digit Unicode escaped characters.
CSS Level 1 <string>	Recommendation	Implicit definition; allows 4-digit Unicode escaped characters.

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