Well, i'm using regex to replace all white spaces to mas but there's a white space at the end and i don't know how to make the regex not replace him

What I have

25DEL 38DEL A73G

JS

 var valor = $("#mapaArquivos option:selected").val().replace(/\s+/g, ", ");

Output

25DEL, 38DEL, A73G,

Right Output

25DEL, 38DEL, A73G

Thanks for the help anyway!

Well, i'm using regex to replace all white spaces to mas but there's a white space at the end and i don't know how to make the regex not replace him

What I have

25DEL 38DEL A73G

JS

 var valor = $("#mapaArquivos option:selected").val().replace(/\s+/g, ", ");

Output

25DEL, 38DEL, A73G,

Right Output

25DEL, 38DEL, A73G

Thanks for the help anyway!

• javascript
• jquery
• regex

3 Answers 3

Trim the value before applying regex. this way there will be no trailing or leading spaces

var valor = jQuery.trim($("#mapaArquivos option:selected").val())
                  .replace(/\s+/g, ", ");

You could trim the end or you could use

replace( /(?!\s+$)\s+/g, ", " );

A negative look-ahead prevents trailing spaces being replaced.

This should do (it trims the Whitespaces of the initial value first)

var valor = $("#mapaArquivos option:selected").val().replace(/^\s+|\s+$/g,"").replace(/\s+/g, ", ");

if not, you might want to try replace(/\s+$/,"")instead (trims only at the end