Question

I’m trying to remove some unwanted whitespace from JavaScript files, and combine files using C# and Regex, before they are sent to the client. I have a JavascriptHandler to handle the .js files, which works fine. This is the function that I’m using to “pack” the JavaScript.

private string PackJs(string file)
{
    string text = System.IO.File.ReadAllText(JSFolder + file);

    //replace any combination of unwanted whitespace with a single space
    text = Regex.Replace(text, @"[\r\n\s]+", " ");

    //Can I get this to match +, =, -, etc?
    text = Regex.Replace(text, @"( [=] )", "="); 

    //more regular expressions here, when I get round to it

    return text;
}

My second expression currently will replace ” = ” with “=”. I’d like to specify more characters and keywords that can have the spaces removed from either side.

How do I search for this in the regular expression, then back-reference that character or keyword in the replacement?

Thanks,

Answer 1

Inside [] put your characters

var input = "c = a + b";
var result = Regex.Replace(input, @"\s([=+])\s", "$1");

Result would be: c=a+b