How can I remove extra white space in a string in JavaScript?

Question

How can I remove extra white space (i.e. more than one white space character in a row) from text in JavaScript?

E.g

match    the start using.

How can I remove all but one of the spaces between "match" and "the"?

Answer 1

Use regex. Example code below:

var string = 'match    the start using. Remove the extra space between match and the';
string = string.replace(/\s{2,}/g, ' ');

For better performance, use below regex:

string = string.replace(/ +/g, ' ');

Profiling with firebug resulted in following:

str.replace(/ +/g, ' ')        ->  790ms
str.replace(/ +/g, ' ')       ->  380ms
str.replace(/ {2,}/g, ' ')     ->  470ms
str.replace(/\s\s+/g, ' ')     ->  390ms
str.replace(/ +(?= )/g, ' ')    -> 3250ms

Answer 2

See string.replace on MDN

You can do something like this:

var string = "Multiple  spaces between words";
string = string.replace(/\s+/,' ', g);

Answer 3

Just do,

var str = "match    the start using. Remove the extra space between match and the";
str = str.replace( /\s\s+/g, ' ' );

Answer 4

  function RemoveExtraSpace(value)
  {
    return value.replace(/\s+/g,' ');
  }

Answer 5

myString = Regex.Replace(myString, @"\s+", " "); 

or even:

RegexOptions options = RegexOptions.None;
Regex regex = new Regex(@"[ ]{2,}", options);     
tempo = regex.Replace(tempo, @" ");

Answer 6

Using regular expression.

var string = "match    the start using. Remove the extra space between match and the";
string = string.replace(/\s+/g, " ");

Here is jsfiddle for this