Javascript get complete word after matching special character in string

Question

This code not running when put Textx-yz but runs fine when put Textx-y

I want a alert(Textx-yz) when put Textx-,Textx,Textx-yz in match

alert('Textabc Textx-yz TextTypeTestingText'.match(/Textx-yz\S+/)[0])

Answer 1

you can use word boundaries and exact match to get this match:

\b(Textx\-yz)+\b

\b - searches whole words only

and in between we tell it what we want to find

Answer 2

If I understand what you mean you can this pattern:

'Textabc Textx-yz TextTypeTestingText'.match(/Textx-yz \S+/)[0]

Actually I add a space after -yz in match method

Answer 3

If you need the expression to match in any given string the pattern Textx followed or not by a dash and [a-ZA-Z0-9_] characters, the regex you are looking for is: (Textx(-[\w]+)?)

It's not perfectly clear what did you expect when the string contained an invalid expression like 'Textx- unwanted'. In this case my code returns 'Textx' with no following dash. Anyway I separated the capture group for the second part so that you could add further logic in the doMatch function doing some further consideration beyond the regex.

Here's a demo:

function doMatch(subject){

  //this is an expression having 1 optional grouped capture as being the part "dash following something"
  let pattern = /Textx(-[\w]+)?/;  
  
  let match = subject.match(pattern);

  //the whole text matched by the expression
  //console.log(match[0]);
  //the optional text matched after Textx starting with dash and at least one \w char
  //this will be undefined if 'Textx-' or 'Textx' but not for 'Textx-anything'
  //console.log(match[1]); 
                               
  return match[0];
}

console.log('------begin------');

let matchedString;

//1- Textx (alone)
matchedString = doMatch('Textx');
console.log( matchedString ); //-> Textx

//2- Textx (alone and having further text later separated by space)
matchedString = doMatch('Textabc Textx unwanted');
console.log( matchedString ); //-> Textx

//3- Textx (followed by '-randomstuff')
matchedString = doMatch('Textabc Textx-randomstuff');
console.log( matchedString ); //-> Textx-randomstuff

//4- Textx (followed by '-randomstuff' and having further text later separated by space)
matchedString = doMatch('Textabc Textx-randomstuff unwanted');
console.log( matchedString ); //-> Textx-randomstuff

//5- Textx- (where the dash is not followed by valid characters and it's the end of string)
matchedString = doMatch('Textx-');
console.log( matchedString ); //-> Textx

//6- Textx- (where the dash is not followed by valid characters and there's further text)
matchedString = doMatch('Textabc Textx- unwanted');
console.log( matchedString ); //-> Textx