JavaScript正则表达式-如何用标记包装匹配项? [英] JavaScript regex - How to wrap matches with tag?

问题描述

我在JavaScript中有一个字符串，我想在其中找到给定短语的所有匹配项，并用标记将它们包装起来.我在这里找不到正确的regex方法来替换不区分大小写的短语，并用其周围的其他文本替换为它自己.例如:

I have a string in JavaScript in which I'd like to find all matches of a given phrase and wrap them with a tag. I haven't been able to find the right regex method here to replace a case insensitive phrase and replace it with itself with additional text around it. For example:

输入字符串:

"I like to play with cats, as does Cathy, who is a member of ACATA, which is the American Cat And Tiger Association."

不区分大小写的词组:猫"

Case insensitive phrase: "cat"

输出字符串:

"I like to play with <em>cat</em>s, as does <em>Cat</em>hy, who is a member of A<em>CAT</em>A, which is the American <em>Cat</em> And Tiger Association."

因此，基本上，在所有匹配项附近注入<em></em>.我不能只做一个简单的替换，因为我会丢失输入字符串中的原始大小写.

So, basically, inject <em></em> around any matches. I can't just do a straight-up replace, because I'll lose the original case in the input string.

推荐答案

您可以使用:

"Foo bar cat".replace(/(cat)/ig, "<em>$1</em>");

哪个会返回:

"Foo bar <em>cat</em>"

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