Remove the last “\n” from a textarea

问题

How to remove the last "\n" from a textarea?

回答1:

verses ="1\n222\n"
verses = verses.replace(/\n$/, "")
-> returns "1\n222"

回答2:

from http://en.wikipedia.org/wiki/Trim_%28programming%29

String.prototype.trim = function() {
  return this.replace(/^\s+|\s+$/g, "");
};

That will add a trim function to string variables that will remove whitespace from the beginning and end of a string.

With this you can do stuff like:

var mystr = "this is my string   "; // including newlines
mystr = mystr.trim();

回答3:

$.trim() should do the trick!

It trims whitespace and newline characters from the beginning and ending of the specified string.

回答4:

I personally like lodash for trimming newlines from strings. https://lodash.com/

_.trim(myString);

来源：https://stackoverflow.com/questions/3084708/remove-the-last-n-from-a-textarea