regex - Javascript replace with reference to matched group? - Stack Overflow

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I have a string, such as hello _there_. I'd like to replace the two underscores with <div> and </div> respectively, using JavaScript. The output would (therefore) look like hello <div>there</div>. The string might contain multiple pairs of underscores.

What I am looking for is a way to either run a function on each match, the way Ruby does it:

"hello _there_".gsub(/_.*?_/) { |m| "<div>" + m[1..-2] + "</div>" }

Or be able to reference a matched group, again the way it can be done in ruby:

"hello _there_".gsub(/_(.*?)_/, "<div>\\1</div>")

Any ideas or suggestions?

I have a string, such as hello _there_. I'd like to replace the two underscores with <div> and </div> respectively, using JavaScript. The output would (therefore) look like hello <div>there</div>. The string might contain multiple pairs of underscores.

What I am looking for is a way to either run a function on each match, the way Ruby does it:

"hello _there_".gsub(/_.*?_/) { |m| "<div>" + m[1..-2] + "</div>" }

Or be able to reference a matched group, again the way it can be done in ruby:

"hello _there_".gsub(/_(.*?)_/, "<div>\\1</div>")

Any ideas or suggestions?

• javascript
• regex

Share Improve this question Follow edited Aug 3, 2018 at 4:00 user6269864 asked Aug 5, 2009 at 17:48 Sinan TaifourSinan Taifour 10.8k33 gold badges3434 silver badges3131 bronze badges

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3 Answers 3

Sorted by: Reset to default 531

"hello _there_".replace(/_(.*?)_/, function(a, b){
    return '<div>' + b + '</div>';
})

Oh, or you could also:

"hello _there_".replace(/_(.*?)_/, "<div>$1</div>")

You can use replace instead of gsub.

"hello _there_".replace(/_(.*?)_/g, "<div>\$1</div>")

For the replacement string and the replacement pattern as specified by $. here a resume:

link to doc : here

"hello _there_".replace(/_(.*?)_/g, "<div>$1</div>")

Note:

If you want to have a $ in the replacement string use $$. Same as with vscode snippet system.

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