在javascript中匹配并替换整个单词 [英] Match and replace whole words in javascript

问题描述

我有一个textarea，当我写，例如，想要，我想用两个替换它。

I have a textarea, and when I write, for example, "want", I want to replace it with "two".

如何在javascript中匹配和替换整个单词？

How can I match and replace whole words in javascript?

推荐答案

您可以使用单词boundary \b ，所以 \ bwant \ b 。请记住，单词的正则表达式定义可能不适合您。 Javascript正则表达式将单词边界定义为单词字符 \w 之间的位置，即 [a-zA-Z0-9 _] 和一个非单词字符（除此之外的所有内容）。

You can use the word boundary \b, so \bwant\b. Do keep in mind that the regex definition of a word may not suit you, though. Javascript regex defines word boundaries as the place between a word character \w, which is [a-zA-Z0-9_] and a non-word character (everything except that).

• regular-expressions.info/Word boundary

• regular-expressions.info/Word boundaries

• 中有一个 \ bcan \b 不能（因为'不是 \ w ）


• 没有 \\ \\ blove \b in love_me（因为 e 和 _ 都是 \ w ）

• There's a \bcan\b in "can't" (because ' is not a \w)
• There's no \blove\b in "love_me"(because e and _ are both \w)

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