javascript - How to limit a regex capturing group? - Stack Overflow

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I don't get how I can limit a capturing group.

If I have a regex like this:

/^(\w{2,}\s\w{2,}){4,15}$/

I would think that this would capture any string with:

• Exact two words,
• With each word least 2 characters long,
• And whole string no longer than 15 characters.

But the limiting of my capturing groups doesn't work. Can I limit capturing groups at all?

PS. I am using JavaScript to test the regexes in my examples.

I don't get how I can limit a capturing group.

If I have a regex like this:

/^(\w{2,}\s\w{2,}){4,15}$/

I would think that this would capture any string with:

• Exact two words,
• With each word least 2 characters long,
• And whole string no longer than 15 characters.

But the limiting of my capturing groups doesn't work. Can I limit capturing groups at all?

PS. I am using JavaScript to test the regexes in my examples.

• javascript
• regex

Share Improve this question Follow edited Jun 16, 2014 at 19:32 Amal 76.7k1818 gold badges132132 silver badges153153 bronze badges asked Jun 13, 2014 at 17:31 NanoNano 1,39866 gold badges2020 silver badges3333 bronze badges

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1 Answer 1

Sorted by: Reset to default 8

This lookahead based regex should work for you:

/^(?=.{4,15}$)\w{2,}\s\w{2,}$/

Working Demo

Your regex: ^(\w{2,}\s\w{2,}){4,15}$ basically means there should be between 4 to 15 instances of a string containing 2 words with at least 2 characters separated by a space

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