Question

12

regex - replace multi line breaks with single in javascript

rated 0 times [ 18] [ 6] / answers: 1 / hits: 39408 / 12 Years ago, sat, june 9, 2012, 12:00:00

this is some kind of variable content in javascript:

    <meta charset=utf-8>



    <title>Some Meep meta, awesome</title>









    <-- some comment here -->

    <meta name=someMeta, yay content=meep>



</head>

I want to reduce the multi line breaks (unknown number) to a single line break while the rest of the formatting is still maintained. This should be done in javascript with a regex.

I have problems with the tabulator or to keep the format.

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magaly

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answered 12 Years ago leonardok · Accepted Answer

Try this:

text.replace(/ns*n/g, 'n');

This basically looks for two line breaks with only whitespace in between. And then it replaces those by a single line break. Due to the global flag g, this is repeated for every possible match.

edit:

is it possibile to leave a double line break instead of a single

Sure, simplest way would be to just look for three line breaks and replace them by two:

text.replace(/ns*ns*n/g, 'nn');

If you want to maintain the whitespace on one of the lines (for whatever reason), you could also do it like this:

text.replace(/(ns*?n)s*n/, '$1');