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Asked: 2026-05-22T03:23:25+00:00

I am trying to replace HTML content with regular expression. from <A HREF=ZZZ>test test

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I am trying to replace HTML content with regular expression.

from

<A HREF="ZZZ">test test ZZZ<SPAN>ZZZ test test</SPAN></A>

to 

<A HREF="ZZZ">test test AAA<SPAN>AAA test test</SPAN></A>

note that only words outside HTML tags are replaced from ZZZ to AAA.

Any idea? Thanks a lot in advance.

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1 Answer

  1. Editorial Team

    Assuming a well-formed html document with outer/enclosing tags like <html>, I would think the easiest way would be to look for the > and < signs:

    /(\>[^\>\<]*)ZZZ([^\>\<]*\<)/$1AAA$2/

    If you’re dealing with HTML fragments that may not have enclosing tags, it gets a little more complicated, you’d have to allow for start of string and end of string

    Example JS (sorry, missed the tag):

    alert('<A HREF="ZZZ">test test ZZZ<SPAN>ZZZ test test</SPAN></A>'.replace(/(\>[^\>\<]*)ZZZ([^\>\<]*\<)/g, "$1AAA$2"));

    Explanation: for each match that

    • starts with >: \>
    • follows with any number of characters that are neither > nor <: [^\>\<]*
    • then has “ZZZ”
    • follows with any number of characters that are neither > nor <: [^\>\<]*
    • and ends with <: \<

    Replace with

    • everything before the ZZZ, marked with the first capture group (parentheses): $1
    • AAA
    • everything after the ZZZ, marked with the second capture group (parentheses): $2

    Using the “g” (global) option to ensure that all possible matches are replaced.

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