removing space and retaining the new line?

i want to repla开发者_如何学编程ce all the spaces from a string , but i need to keep the new line character as it ?

choiceText=choiceText.replace(/\s/g,'');

india
aus //both are in differnt line 

is giving as indaus

i want newline should retain and remove the s

\s means any whitespace, including newlines and tabs. is a space. To remove just spaces:

choiceText=choiceText.replace(/ /g,''); // remove spaces

You could remove "any whitespace except newlines"; most regex flavours count \s as [ \t\r\n], so we just take out the \n and the \r and you get:

choiceText=choiceText.replace(/[ \t]/g,''); // remove spaces and tabs

You can't use \s (any whitespace) for this. Use a character set instead: [ \t\f\v]

The \s regex pattern matches all whitespace chars. According to MDN, \s is "equivalent to [ \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]".

The easiest way to subtract a line feed, a newline, char from \s is to use a reverse, \S, shorthand character class, put it into a negated character class, [^\S] and add \n into it, that is, [^\S\n].

See a JavaScript demo:

console.log(
  "india\naus \f\r\t\v\u00a0\u1680\u2000\u200a\u2028\u2029\u202f\u205f\u3000\ufeff."
     .replace(/[^\S\n]+/g, ''))