Question 49948 in Javascript Question posted in
A very good W3school tutorial can be found here.

Trim space along with hyphen from a string at start and end of the string – Javascript

I have a string in JavaScript like var s="test - test1" and sometimes s=" - test1" and sometimes just " -". I want to remove the space and hyphen only if it’s present at the start and end of the string. Meaning, we should not do anything for the 1st case s="test - test1".

Expected Result:

var s="test - test1"

result should be "test - test1"

var s=" - test1"

result should be "test1"

" -"

result should be ""

Could you guys help me on this?

Tags:

3

Answers


  1. 0

    I assume you want to remove all spaces with the following hyphens, then just replace it with this method .replace(/ -/g,'').

    var s="test - test1";
console.log(s.replace(/ -/g,''))
s = " - test1";
console.log(s.replace(/ -/g,''))
s = " -";
console.log(s.replace(/ -/g,''))
s="test - test1 - test2";
console.log(s.replace(/ -/g,''))
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  2. 0 
      
var s="test - test1";
var reg = new RegExp(/-$|^-/ig);
console.log(s.trim().replace(reg,"").trim());
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  3. 0

    A regex-only solution (try-its were modified a bit to avoid messing with line breaks):

    function removeLeadingTrailingHyphens_match(s) {
  return s.match(/^(?:s*-s*)?(.*?)(?:s*-s*)?$/)[1];
}

    Try it on regex101.com.

    …or, using .replace():

    function removeLeadingTrailingHyphens_replace(s) {
  return s.replace(/^s*-s*|s*-s*$/);
}

    Try it on regex101.com.

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