Regex if more than two line to two line else one line

Question

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This could be trivial, but I am not able to find or resolve.

If more than two line break, then two line break, else one-line break.

What I could write is:

.replace(\[\r\n]{2, } ? \n\n, "\n\n ? \n")

But this is giving error

Answer 1

You can match 3 or more linebreaks, and replace with 2 newlines or match 2 newlines using an alternation and replace that with 1 newline.

((?:\r?\n){3,})|(?:\r?\n){2}

Regex demo

 let str = `test1 test2 test3 test4`; str = str.replace(/((?:\r?\n){3,})|(?:\r?\n){2}/g, (_, g1) => g1? "\n\n": "\n"); console.log(str);

Regex if more than two line to two line else one line

Question

1 answers

solution1
1 ACCPTED 2021-03-21 09:28:23

Regex if more than two line to two line else one line

Question

1 answers

solution1 1 ACCPTED 2021-03-21 09:28:23

solution1
1 ACCPTED 2021-03-21 09:28:23