Trim spaces from start and end of string

Question

I am trying to find a way to trim spaces from the start and end of the title string  I was using this  but it doesn t seem to be working   title   title replace      s     s     g         Any ideas

User · Answer

Here is some methods I ve been used in the past to trim strings in js   String prototype ltrim   function  chars         chars   chars       s        return this replace  new RegExp        chars          g             String prototype rtrim   function  chars         chars   chars       s        return this replace  new RegExp       chars           g            String prototype trim   function  chars         return this rtrim chars  ltrim chars

User · Answer

I know this is an old post  but just thought I d share our solution  In the quest for shortest code  doesn t everyone just love terse regex   one could instead use   title   title replace     s   s    g         BTW  I ran this same test through the link shared above blog stevenlevithan com -- Faster JavaScript Trim and this pattern beat all the other HANDS down   Using IE8  added test as test13  The results were      Original length  226002   trim1  110ms  length  225994    trim2  79ms  length  225994    trim3  172ms  length  225994    trim4  203ms  length 225994    trim5  172ms  length  225994    trim6  312ms  length  225994    trim7  203ms  length  225994    trim8  47ms  length  225994    trim9  453ms  length  225994    trim10  15ms  length  225994    trim11  16ms  length  225994    trim12  31ms  length  225994    trim13  0ms  length  226002

User · Answer

Note  As of 2015  all major browsers  including IE  9  support String prototype trim    This means that for most use cases simply doing str trim   is the best way of achieving what the question asks      Steven Levithan analyzed many different implementation of trim in Javascript in terms of performance   His recommendation is   function trim1  str        return str replace    s s        replace   s s              for  general-purpose implementation which is fast cross-browser   and  function trim11  str        str   str replace    s             for  var i   str length - 1  i  gt   0  i--            if    S  test str charAt i                  str   str substring 0  i   1               break                      return str       if you want to handle long strings exceptionally fast in all browsers    References   blog stevenlevithan com -- Faster JavaScript Trim

User · Answer

If using jQuery is an option          Trim the site input type text  fields globally by removing any whitespace from the    beginning and end of a string on input  blur          input type text    blur function          this  val   trim   this  val            or simply     trim string

User · Answer

As  ChaosPandion mentioned  the String prototype trim method has been introduced into the ECMAScript 5th Edition Specification  some implementations already include this method  so the best way is to detect the native implementation and declare it only if it s not available   if  typeof String prototype trim     function        detect native implementation   String prototype trim   function          return this replace    s        replace   s                   Then you can simply   title   title trim

User · Answer

Just use string trim   method  It s supported by all major browsers  Reference here  http   www w3schools com jsref jsref trim string asp

User · Answer

When the DOM is fully loaded  you can add this to all the text fields  I have never had a situation where I needed to submit leading or trailing space  so doing it all the time globally has worked for me       function        input type text    on  blur   function          this  val   trim   this  val

User · Answer

a recursive try for this   function t k        if  k 0                  return t k substr 1 k length          else if  k k length-1                  return t k substr 0 k length-1          else           return k            call like this   t        mehmet               gt  mehmet    if you want to filter spesific chars you can define a list string basically   function t k       var l   r n t      you can add more chars here      if  l indexOf k 0   gt -1            return t k substr 1 k length          else if  l indexOf k k length-1   gt -1            return t k substr 0 k length-1          else           return k

User · Answer

var word     testWord        add here word or space and test  var x     trim word    if x length  gt  0      alert  word    else     alert  spaces

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This is what is suggested by JavaScript Architect Guru Douglas Crockford   String method  trim   function            return this replace    s   s   g             Note  you have to define  method  for Function prototype   Alternatively  String prototype trim   function         return this replace    s   s   g           title trim          returns trimmed title   Observation  In recent browsers  the trim method is included by default  So you don t have to add it explicitly   Major browsers Chrome  Firefox  Safari etc  supports trim method  Checked in Chrome 55 0 2883 95  64-bit   Firefox 51 0 1  64-bit   Safari 10 0  12602 1 50 0 10

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ECMAScript 5 supports trim and this has been implemented in Firefox   trim - MDC

User · Answer

Here  this should do all that you need  function doSomething input        return input                replace    s s               Remove Preceding white space                replace   s s                Remove Trailing white space                replace     s    g   -       Replace remaining white space with dashes    alert doSomething    something with  some       whitespace

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Here is my current code  the 2nd line works if I comment the 3rd line  but don t work if I leave it how it is   var page title     this  val   replace    a-zA-Z0-9 s  g       page title   page title replace    s s        replace   s s          page title   page title replace     s    g   -

User · Answer

You can use trimLeft   and trimRight   also  const str1    quot    string    quot   console log str1 trimLeft           gt   quot string    quot   const str2    quot    string    quot   console log str2 trimRight          gt   quot     string quot

User · Answer

jQuery trim      hello  how are you

[javascript] Trim spaces from start and end of string

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