html - 我可以使用 css Direction-rtl < 和 > 交换吗？

Question

我发现 css direction: rtl 会交换文本中的 < 和 > 符号。我查看了 w3c 规范，但没有发现任何提及这一点的内容。问题是关于浏览器支持和可能的陷阱。哪些字符被这样替换？如果我使用带有 < 且不带 > 字符的自定义字体，会发生什么情况？

Answer 1

问题“哪些字符会被这样替换？”在 Unicode Character Database 中解决在标题属性定义下:

BidiMirroring.txt

Informative mapping for substituting characters in an implementation of bidirectional mirroring. This maps a subset of characters with the Bidi_Mirrored property to other characters that normally are displayed with the corresponding mirrored glyph. When a character with the Bidi_Mirrored property has the default value for Bidi_Mirroring_Glyph, that means that no other character exists whose glyph is appropriate for character-based glyph mirroring. Implementations must then use other mechanisms to implement mirroring of those characters for the Unicode Bidirectional Algorithm. See Unicode Standard Annex #9, "Unicode Bidirectional Algorithm" [UAX9]. Do not confuse this property with the Bidi_Mirrored property itself.

可以在此处找到 BidiMirroring.txt 文件:http://unicode.org/Public/UNIDATA/BidiMirroring.txt

包含

0028; 0029 # LEFT PARENTHESIS
0029; 0028 # RIGHT PARENTHESIS
003C; 003E # LESS-THAN SIGN
003E; 003C # GREATER-THAN SIGN
005B; 005D # LEFT SQUARE BRACKET
005D; 005B # RIGHT SQUARE BRACKET
007B; 007D # LEFT CURLY BRACKET
007D; 007B # RIGHT CURLY BRACKET

还有更多!

然后是浏览器支持:快速、肮脏且绝不权威的测试表明，IE8、FF3.6、Chrome 20 和 Opera 11 等老浏览器都支持它。

目前无法测试 > 的字体但没有<字形，抱歉。