Javascript + Unicode正则表达式 [英] Javascript + Unicode regexes

问题描述

如何在JavaScript中使用支持Unicode的正则表达式？例如，应该有类似于\w的东西可以匹配字母或标记类别中的任何代码点（不仅仅是ASCII代码），并且希望像[[P *]]这样的过滤器用于标点符号等。

解决方案

ES 6的情况

即将推出的ECMAScript语言规范，第6版，包括支持Unicode的正则表达式。必须使用正则表达式上的 u 修饰符启用支持。请参阅 ES6中支持Unicode的正则表达式 。

在ES 6完成并在浏览器供应商中广泛采用之前，你仍然可以自己动手。 更新：现在有一个名为 regexpu 的转录程序ES6 Unicode正则表达式转换为等效的ES5。它可以用作构建过程的一部分。 在线试用。

ES 5和在

尽管JavaScript在Unicode字符串上运行，但它不实现支持Unicode的字符类，并且没有POSIX字符类或Unicode块/子范围的概念。 / p>

• JavaScript正则表达式中的Unicode问题




• 在此处检查您的期望： Javascript RegExp Unicode字符类测试程序（编辑：原始页面已关闭，互联网档案馆仍有一份副本。）




• Flagrant Badassery有一篇关于 JavaScript，正则表达式和Unicode ，揭示了这个问题。




• 此处还可以阅读 Regex和Unicode 。可能你必须建立自己的标点字符类。




• 查看正则表达式：匹配Unicode块范围构建器，它允许您构建一个JavaScript正则表达式，该表达式匹配属于任意数量的指定Unicode块的字符。

  
  
  

  我刚刚为General Punctuation和Supplemental Punctuation子范围做了这个，结果就像我预期的一样简单直接：

    [\ u2000-\ u206F \ u2E00-\\\ u2E7F] 
    




• 还有 XRegExp ，通过提供具有扩展功能的替代正则表达式引擎，将 Unicode支持JavaScript 带入的项目。




• 当然，需要阅读： mathiasbynens。是 - JavaScript有一个Unicode问题：

How can I use Unicode-aware regular expressions in JavaScript? For example, there should be something akin to \w that can match any code-point in Letters or Marks category (not just the ASCII ones), and hopefully have filters like [[P*]] for punctuation etc.

解决方案

Situation for ES 6

The upcoming ECMAScript language specification, edition 6, includes Unicode-aware regular expressions. Support must be enabled with the u modifier on the regex. See Unicode-aware regular expressions in ES6.

Until ES 6 is finished and widely adopted among browser vendors you're still on your own, though. Update: There is now a transpiler named regexpu that translates ES6 Unicode regular expressions into equivalent ES5. It can be used as part of your build process. Try it out online.

Situation for ES 5 and below

Even though JavaScript operates on Unicode strings, it does not implement Unicode-aware character classes and has no concept of POSIX character classes or Unicode blocks/sub-ranges.

• Issues with Unicode in JavaScript regular expressions

• Check your expectations here: Javascript RegExp Unicode Character Class tester (Edit: the original page is down, the Internet Archive still has a copy.)

• Flagrant Badassery has an article on JavaScript, Regex, and Unicode that sheds some light on the matter.

• Also read Regex and Unicode here on SO. Probably you have to build your own "punctuation character class".

• Check out the Regular Expression: Match Unicode Block Range builder, which lets you build a JavaScript regular expression that matches characters that fall in any number of specified Unicode blocks.

  I just did it for the "General Punctuation" and "Supplemental Punctuation" sub-ranges, and the result is as simple and straight-forward as I would have expected it:

  [\u2000-\u206F\u2E00-\u2E7F]
  

• There also is XRegExp, a project that brings Unicode support to JavaScript by offering an alternative regex engine with extended capabilities.

• And of course, required reading: mathiasbynens.be - JavaScript has a Unicode problem:

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