匹配字符串，除非它在方括号内

Question

I'm trying to adapt the a JQuery zen coding plug in I found to my own uses. One of the issues I'm having is a bug inside the code where something like

a[href="google.com"]

will expand to

 <a href="google.com" class="com"</a>

The regex being used by the code is:

/(\.[\w-]+)/gi

Which I have modified with a look-ahead to see if there is an even number of brackets in front of it.

/(\.[\w-]+)(?=([^\]]*\][^\]]*\])*[^\]]*$)/gi

I've used regex testers and it seems to work, but when using javascript .match() , it is returning ".com" as a match inside the above string.

The below response has solved the bug in question but has created a new one. Now:

a.class[href="google.com"]

is not resolving to

http://jsfiddle.net/sA9sQ/

EDIT: I accepted the answer below because it got me where I needed to go. The final regex turned out to be /(\\.[\\w-]+)(?=([^\\]]*\\][^\\]]*\\])*[^\\]]*\\.[\\w-]+)/gi

Answer 1

尝试将前瞻移至正则表达式的前面，如下所示：

/(?=([^\]]*\][^\]]*\])*[^\]]*$)(\.[\w-]+)/gi