Regex to remove spaces between \n in block of text

Question

In javascript, I am trying to write a regex that will remove all spaces between occurrences of \n.

For example, the string Test\n \n \n \n\n 1234 would turn into Test\n\n\n\n\n 1234.

How do I do this?

replacing this regex ^([\s\t]*)\n$ with "\n" would work? it should match every single line replacing the space part before the newline with nothing but a newline. — Diego D
– Diego D, Commented Jun 6, 2022 at 14:18

Wyck · Accepted Answer · 2022-06-06 14:24:54Z

3

You can use non-greedy matching of whitespace \s*? bracketed by lookbehind and lookahead assertions for \n, (expressed as (?<=\n) and (?=\n) respectively) and replace it with an empty string.

const input = "Test\n \n \n    \n\n 1234";
const result = input.replace(/(?<=\n)\s*?(?=\n)/g, '');

console.log(JSON.stringify(result));

answered Jun 6, 2022 at 14:24

Wyck

12.1k8 gold badges50 silver badges93 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

arnaud_h · Accepted Answer · 2022-06-06 14:25:25Z

0

let t = "test\n\n \n\n\n \n"

console.log(JSON.stringify(t.replaceAll(/(?<=\n)\s*?(?=\n)/g, '')))

edited Jun 6, 2022 at 14:25

answered Jun 6, 2022 at 14:22

arnaud_h

1215 bronze badges

1 Comment

Joe Over a year ago

I don't want to replace all spaces. Just ones between newlines.

Collectives™ on Stack Overflow

Regex to remove spaces between \n in block of text

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related