How to remove spaces from a string using JavaScript

Question

How to remove spaces in a string  For instance   Input     var www site Brand new document docx    Output     var www site Brandnewdocument docx

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easy way    someString replace

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This   str   str replace   s g         Example   x000D   x000D  var str     var www site Brand new document docx   x000D   x000D  document write  str replace   s g         x000D   x000D   x000D      Update  Based on this question  this   str   str replace   s  g         is a better solution  It produces the same result  but it does it faster   The Regex   s is the regex for  whitespace   and g is the  global  flag  meaning match ALL  s  whitespaces     A great explanation for   can be found here   As a side note  you could replace the content between the single quotes to anything you want  so you can replace whitespace with any other string

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Regex   Replace     Although regex can be slower  in many use cases the developer is only manipulating a few strings at once so considering speed is irrelevant  Even though     is faster than   s   having the   s  explains what is going on to another developer perhaps more clearly   let string     var www site Brand new document docx   let path   string replace   s g          path   gt    var www site Brandnewdocument docx       Split     Join     Using Split   Join allows for further chained manipulation of the string   let string     var www site Brand new document docx   let path   gt  string split     map char   gt     s      test char          char  join           var www site Brand new document docx

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your string    Hello world   words array   your tring split        string without space        for i 0  i lt words array length  i         new text    words array i       console log  quot The new word  quot  new text    The output  HelloWorld

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x000D   x000D  var str     var www site Brand new document docx    document write  str replace   s  g           ---------- x000D   x000D   x000D

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SHORTEST and FASTEST  str replace    g        Benchmark  Here my results -  2018 07 13  MacOs High Sierra 10 13 3 on Chrome 67 0 3396  64-bit   Safari 11 0 3  13604 5 6   Firefox 59 0 2  64-bit     SHORT strings Short string similar to examples from OP question  The fastest solution on all browsers is    g  regexp1a  -  Chrome 17 7M  operation sec   Safari 10 1M  Firefox 8 8M  The slowest for all browsers was split-join solution  Change   to  s or add   or i to regexp slows down processing  LONG strings For string about  3 milion character results are   regexp1a  Safari 50 14 ops sec  Firefox 18 57  Chrome 8 95 regexp2b  Safari 38 39  Firefox 19 45  Chrome 9 26 split-join  Firefox 26 41  Safari 23 10  Chrome 7 98   You can run it on your machine  https   jsperf com remove-string-spaces 1

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Following  rsplak answer  actually  using split join way is faster than using regexp  See the performance test case  So   var result   text split      join      operates faster than  var result   text replace   s  g       On small texts this is not relevant  but for cases when time is important  e g  in text analisers  especially when interacting with users  that is important     On the other hand   s  handles wider variety of space characters  Among with  n and  t  it also matches  u00a0 character  and that is what  amp nbsp  is turned in  when getting text using textDomNode nodeValue   So I think that conclusion in here can be made as follows  if you only need to replace spaces      use split join  If there can be different symbols of symbol class - use replace   s  g

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var output     var www site Brand new document docx  replace    g            or   var output     var www site Brand new document docx  replace    gi        Note  Though you use  g  or  gi  for removing spaces both behaves the same   If we use  g  in the replace function  it will check for the exact match  but if we use  gi   it ignores the case sensitivity   for reference click here

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x000D   x000D  var a   b      var www site Brand new   document docx    x000D   x000D  console log  a split      join        x000D  console log  b replace    s g          x000D   x000D   x000D    Two ways of doing this

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var input     var www site Brand new document docx      remove space input   input replace   s g          make string lower input   input toLowerCase     alert input     Click here for working example

[javascript] How to remove spaces from a string using JavaScript?

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