[ACCEPTED]-Trim trailing spaces before newlines in a single multi-line string in JavaScript-regex

Accepted answer

Score: 22

Add the 'm' multi-line modifier.

replace(/\s+$/gm, "")

Or faster still...

replace(/\s\s*$/gm, "")

Why 7 is this faster? See: Faster JavaScript Trim

Addendum: The above expression 6 has the potentially unwanted effect of compressing 5 adjacent newlines. If this is not the desired 4 behavior then the following pattern is preferred:

replace(/[^\S\r\n]+$/gm, "")

Edited 2013-11-17: - Added 3 alternative pattern which does not compress 2 consecutive newlines. (Thanks to dalgard 1 for pointing this deficiency out.)

Source: stackoverflow.com

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