Remove whitespaces inside a string in javascript

Question

I ve read this question about javascript trim  with a regex answer   Then I expect trim to remove the inner space between Hello and World     function myFunction         alert  Hello World   trim         EDITED  Why I expected that     Nonsense  Obviously trim doesn t remove inner spaces   only leading and trailing ones  that s how trim works  then this was a very wrong question  my apologies

User · Answer

You can use  quot Hello World  quot  replace   s  g        trim   only removes trailing spaces on the string  first and last on the chain   In this case this regExp is faster because you can remove one or more spaces at the same time  If you change the replacement  empty string to      the difference becomes much clearer  var string     Q  W E   R TY    console log string replace   s g               Q  W E   R TY  console log string replace   s  g             Q W E R TY   Performance comparison -   s  g is faster  See here  http   jsperf com s-vs-s

User · Answer

For space-character removal use   hello world  replace   s g         for all white space use the suggestion by Rocket in the comments below

User · Answer

Probably because you forgot to implement the solution in the accepted answer  That s the code that makes trim   work   update  This answer only applies to older browsers  Newer browsers apparently support trim   natively

User · Answer

You can use Strings replace method with a regular expression    Hello World   replace    g           The replace   method returns a new string with some or all matches of   a pattern replaced by a replacement  The pattern can be a string or a   RegExp   RegExp       - Regular expression matching spaces g - Global flag  find all matches rather than stopping after the first match    x000D   x000D  const str    H    e            l l       o  World    replace    g       x000D  document getElementById  greeting   innerText   str  x000D   lt p id  greeting  gt  lt p gt  x000D   x000D   x000D

[javascript] Remove whitespaces inside a string in javascript

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