javascript中与正则表达式匹配的主题标签边界 [英] hashtag boundaries matching regex in javascript

问题描述

我正在尝试匹配JavaScript字符串中的一组标签或单词.

I'm trying to match a set of hashtags or words in a javascript string.

(#hashtag|word)

几乎可以做到，除了我想考虑单词边界.

almost does it, except I'd like to consider word boundaries.

\b(#hashtag|word)\b

与开头的单词边界不匹配，因为#"当然不是单词字符.

doesn't match the beginning word boundary, since of course '#' is not a word character.

理想情况下，我希望具有与主题标签匹配的"\ b"锚.有什么主意吗?

ideally i'd like to have something like a '\b' anchor that matches hashtags. Any idea?

推荐答案

在括号内插入单词边界怎么办?

What about insert word boundary inside the parenths :

/(#\bhashtag|\bword)\b/

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