Replace multiple whitespaces with single whitespace in JavaScript string

Question

I have strings with extra whitespaces  each time there s more than only one whitespace I d like it be only one   Anyone  I tried searching google  but nothing worked for me   Thanks

User · Answer

You can augment String to implement these behaviors as methods, as in:

String.prototype.killWhiteSpace = function() {
    return this.replace(/\s/g, '');
};

String.prototype.reduceWhiteSpace = function() {
    return this.replace(/\s+/g, ' ');
};

This now enables you to use the following elegant forms to produce the strings you want:

"Get rid of my whitespaces.".killWhiteSpace();
"Get rid of my extra        whitespaces".reduceWhiteSpace();

User · Answer

How about this one    my    test  string  t t with crazy stuff      is cool   replace   s 2 9999   t g        outputs  my test string with crazy stuff is cool    This one gets rid of any tabs as well

User · Answer

Here s a non-regex solution  just for fun    x000D   x000D  var s     a   b   word word  word  wordword word          with ES5  s   s split      filter function n   return n          join       console log s       a b word word  word  wordword word      or ES2015  s   s split      filter n   gt  n  join        console log s       a b word word  word  wordword word  x000D   x000D   x000D   Can even substitute filter n   gt  n  with  filter String  It splits the string by whitespaces  remove them all empty array items from the array  the ones which were more than a single space   and joins all the words again into a string  with a single whitespace in between them

User · Answer

Something like this    x000D   x000D  var s      a  b     c     x000D   x000D  console log  x000D    s replace   s  g       x000D    x000D   x000D   x000D

User · Answer

If you want to restrict user to give blank space in the name just create a if statement and  give the condition  like I did    j   fragment key   bind       keypress  function e           var key   e keyCode      var character   String fromCharCode key        if character match                      alert  Blank space is not allowed in the Name            return false                         create a JQuery function   this is key press event  Initialize a variable  Give condition to match the character  show a alert message for your matched condition

User · Answer

I presume you re looking to strip spaces from the beginning and or end of the string  rather than removing all spaces   If that s the case  you ll need a regex like this   mystring   mystring replace     s   s    g         This will remove all spaces from the beginning or end of the string  If you only want to trim spaces from the end  then the regex would look like this instead   mystring   mystring replace   s   g         Hope that helps

User · Answer

jQuery trim   works well    http   api jquery com jQuery trim

User · Answer

I know I should not necromancy on a subject  but given the details of the question  I usually expand it to mean    I want to replace multiple occurences of whitespace inside the string with a single space    and    I do not want whitespaces in the beginnin or end of the string  trim    For this  I use code like this  the parenthesis on the first regexp are there just in order to make the code a bit more readable     regexps can be a pain unless you are familiar with them    s   s replace     s     s    g      replace   s  g          The reason this works is that the methods on String-object return a string object on which you can invoke another method  just like jQuery  amp  some other libraries   Much more compact way to code if you want to execute multiple methods on a single object in succession

User · Answer

var x     Test   Test Test   split      join      alert x

User · Answer

Try this   var string             string             1   string   string trim   replace   s  g          the result will be  string 1   What happened here is that it will trim the outside spaces first using trim   then trim the inside spaces using  replace   s  g

User · Answer

using a regular expression with the replace function does the trick   string replace   s g

[javascript] Replace multiple whitespaces with single whitespace in JavaScript string

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