使用javascript和regex限制替换和捕获特定的html标签
[英]Using javascript and regex to limit replacement and capture within a specific html tag
问题描述
I'm using javascript and regular expression to convert this html code: 
我正在使用javascript和正则表达式转换此html代码：
<html>
<body>
<document>
==id:firstid;
==href:#anchor32145;
==href:#anchor31274;
==href:#anchor98751;
</document>
<document>
==id:secondid;
==href:#anchor62341;
</document>
<document>
==id:thirdid;
==href:#achor52153;
==href:#anchor98421;
</document>
</body>
</html>
into this format: 变成这种格式：
<html>
<body>
<document>
==id:firstid;
==href: firstid #anchor32145;
==href: firstid #anchor31274;
==href: firstid #anchor98751;
</document>
<document>
==id:secondid;
==href: secondid #anchor62341;
</document>
<document>
==id:thirdid;
==href: thirdid #anchor52153;
==href: thirdid #anchor98421;
</document>
</body>
</html>
as you can see, what I'm trying to do is distribute the value of ==id: to all =href: within the same document tag. 如您所见，我正在尝试将== id：的值分发到同一文档标签中的所有= href：。 I'm relatively new to javascript, so any help to achieve this would be greatly appreciated. 我对javascript比较陌生，因此非常感谢您能提供帮助。
1 个解决方案
解决方案1
2 已采纳 2016-11-29 22:09:32
There are saner ways of doing this other than straight regex (an XML parser for example), 除了简单的正则表达式（例如XML解析器）之外，还有其他更明智的方法，
but since you asked for it ... 但是既然你要...
const str = ` <html> <body> <document> ==id:firstid; ==href:#anchor32145; ==href:#anchor31274; ==href:#anchor98751; </document> <document> ==id:secondid; ==href:#anchor62341; </document> <document> ==id:thirdid; ==href:#achor52153; ==href:#anchor98421; </document> </body> </html>` const str2 = str.replace(/(?:<document>)[\\s=\\w]*:(\\w*);[a-z0-9;:#\\s=]*/g, (m, m1, m2) => m.replace(/==href:/g, (mm) => ` ${mm} ${m1} `)) console.log(str2)
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