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• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

<string> CSS data type represents a sequence of characters. Strings are used in numerous CSS properties, such as content , font-family ，和 quotes .

句法

<string> data type is composed of any number of Unicode characters surrounded by either double ( " ) or single ( ' ) quotes.

Most characters can be represented literally. All characters can also be represented with their respective Unicode code points in hexadecimal, in which case they are preceded by a backslash ( \ ). For example, \22 represents a double quote, \27 a single quote ( ' ), and \A9 the copyright symbol ( © ).

Importantly, certain characters which would otherwise be invalid can be escaped with a backslash. These include double quotes when used inside a double-quoted string, single quotes when used inside a single-quoted string, and the backslash itself. For example, \\ will create a single backslash.

To output new lines, you must escape them with a line feed character such as \A or \00000A . In your code, however, strings can span multiple lines, in which case each new line must be escaped with a \ as the last character of the line.

However, to get new lines, you must also set the white-space property to appropriate value.

注意： HTML entities (譬如   or — ) cannot be used in a CSS <string> .

范例

Examples of valid strings

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

规范	状态	注释
CSS Values and Units Module Level 3 The definition of '<string>' in that specification.	候选推荐	No significant change from CSS Level 2 (Revision 1).
CSS Level 2 (Revision 1) The definition of '<string>' in that specification.	推荐	Explicit definition; allows 6-digit Unicode escaped characters.
CSS Level 1 The definition of '<string>' in that specification.	推荐	Implicit definition; allows 4-digit Unicode escaped characters.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
<string>	Chrome 完整支持 1	Edge 完整支持 12	Firefox 完整支持 1	IE 完整支持 3	Opera 完整支持 3.5	Safari 完整支持 1	WebView Android 完整支持 ≤37	Chrome Android 完整支持 18	Firefox Android 完整支持 4	Opera Android 完整支持 10.1	Safari iOS 完整支持 1	Samsung Internet Android 完整支持 1.0
Unicode escaped characters ( \xx )	Chrome 完整支持 1	Edge 完整支持 12	Firefox 完整支持 1	IE 完整支持 6	Opera 完整支持 7	Safari 完整支持 1	WebView Android 完整支持 ≤37	Chrome Android 完整支持 18	Firefox Android 完整支持 4	Opera Android 完整支持 10.1	Safari iOS 完整支持 1	Samsung Internet Android 完整支持 1.0

图例

完整支持

完整支持

另请参阅

• CSS Units and Values
• CSS Basic Data Types
• Introduction to CSS: Values and Units

元数据

• 最后修改： Oct 12, 2020

相关话题

1. CSS
2. CSS 参考
3. CSS Types
4. 特性

   1. <angle-percentage>
   2. <angle>
   3. <basic-shape>
   4. <blend-mode>
   5. <custom-ident>
   6. <dimension>
   7. <frequency-percentage>
   8. <frequency>
   9. <gradient>
   10. <image>
   11. <integer>
   12. <length-percentage>
   13. <length>
   14. <number>
   15. <percentage>
   16. <ratio>
   17. <resolution>
   18. <shape>
   19. <string>
   20. <time-percentage>
   21. <time>
   22. <transform-function>
   23. <url>
   24. color
   25. flex
   26. ident
   27. position