Javascript正则表达式替换精确字符

发布于 2024-11-09 07:28:21 字数 362 浏览 0 评论 0原文

我有这段代码

htmlString= htmlString.replace( new RegExp( "WW(.+?)WW", "gim" ),
    "<span style='color:red;border-bottom:1px dashed red;'>$1</span>" );

这似乎有效，但是它正在替换网址中的 www。我所拥有的是 WW somestring WW 我剪掉 WW 之间的文本并替换它。但是，我似乎无法仅获得确切的字符序列。我尝试了以 [$WW] 结尾的 {WW} ^WW [^WW] 和变体。还尝试了 \bWW 字符串 \bWW 但没有匹配。

任何帮助都会很棒，谢谢。

原文

I have this code

htmlString= htmlString.replace( new RegExp( "WW(.+?)WW", "gim" ),
    "<span style='color:red;border-bottom:1px dashed red;'>$1</span>" );

This seems to work however it is replacing the www's in url's. What I have is WW somestring WW I clip out the text between WW and replace it. However, I can't seem to only get the exact char sequence. I tried {WW} ^WW [^WW] with the end [$WW] and variations. Also tried \bWW string \bWW and no match.

Any help would be great, thanks.

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铁轨上的流浪者 2024-11-16 07:28:21

假设在起始 WW 之后和结束 WW 之前有除字母数字字符之外的其他字符（例如空格），那么您可以这样做：

htmlString = htmlString.replace(/\bWW\b\s*(.+?)\s*\bWW\b/g, 
    "<span style='color:red;border-bottom:1px dashed red;'>$1</span>" );

使用正则表达式对象代替字符串文字使其更易于阅读。如果您在字符串文字中使用了 \b ，则它意味着“退格” - 您需要在字符串文字中转义反斜杠，因此上面的正则表达式将变为 "\\bWW\\ b\\s*(.+?)\\s*\\bWW\\b"。

Assuming that there is something else than alphanumeric characters after the starting WW and before the ending WW (whitespace, for example), then you could do this:

htmlString = htmlString.replace(/\bWW\b\s*(.+?)\s*\bWW\b/g, 
    "<span style='color:red;border-bottom:1px dashed red;'>$1</span>" );

Using a regex object instead of a string literal makes it easier to read. If you had used \b in a string literal it would have meant "backspace" - you need to escape backslashes in a string literal, so the above regex would become "\\bWW\\b\\s*(.+?)\\s*\\bWW\\b".

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