var replace is not a function

Question

I m using the below code to try to trim the string in Javascript but am getting the error mentioned in the title   function trim str        return str replace    s   s   g          Edit   I fixed the problem     sorry I should have put the code on how I was calling it too     realized I accidentally was passing the object of the form field itself rather than its value

User · Answer

probable issues    variable is NUMBER  instead of string   num 35     num replace 3  three                         gt  ERROR num 35     num toString   replace 3  three              gt  CORRECT        num  35    num replace 3  three                         gt  CORRECT        variable is object  instead of string   variable is not defined

User · Answer

In case of a number you can try to convert to string   var stringValue   str toString    return stringValue replace    s   s   g

User · Answer

You should use toString   Method of java script for the convert into string before because replace method is a string function

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My guess is that the code that s calling your trim function is not actually passing a string to it   To fix this  you can make str a string  like this  str toString   replace         as alper pointed out below

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I fixed the problem     sorry I should have put the code on how I was calling it too     realized I accidentally was passing the object of the form field itself rather than it s value   Thanks for your responses anyway

User · Answer

Replace wouldn t replace numbers  It replaces strings only    This should work   function trim str        return str toString   replace    s   s   g          If you only want to trim the string  You can simply use  str trim

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make sure you are passing string to  quot replace quot  method  Had same issue and solved it by passing string  You can also make it to string using toString   method

User · Answer

Did you call your function properly  Ie  is the thing you pass as as a parameter really a string   Otherwise  I don t see a problem with your code - the example below works as expected  function trim str        return str replace    s   s   g          trim      hello           -- gt   hello    However  if you call your functoin with something non-string  you will indeed get the error above   trim          -- gt  TypeError  str replace is not a function

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You should probably do some validations before you actually execute your function      function trim str        if typeof str      string             throw new Error  only string parameter supported                return str replace    s   s   g

User · Answer

You are not passing a string otherwise it would have a replace method  I hope you didnt type function trim str    return var replace blah     instead of return str replace

[javascript] var.replace is not a function

probable issues:

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