Question

So I have a URL validation that I am doing that is very relaxed and more or less just guiding the user to make sure they enter close to a URL.

So I have got a regex that is doing what I want in a tester. (Only Multiline Selected)
ex: http://derekslager.com/blog/posts/2007/09/a-better-dotnet-regular-expression-tester.ashx

However, when I call it in my code, it gives different results.

isURLValid: function (value) {
    var urlRegex = new RegExp("^((http|https|ftp)\://)*([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");
    return urlRegex.test(value);
}

Requirements:
Must support http, https, non http, non https, www, and non-www URL schemes

Valid

http://www.adamthings.com
https://www.adamthings.com
www.adamthings.com
adamthings.com

Invalid

http://www.adamthings 
https://www.adamthings
www.adamthings
adamthings

Results work in the tester, in code I get all of the above are valid. Why does the regex react differently?

Answer 1

In javascript: "\.com" === ".com" (I think it’s not you want.)
Try /regex/ instead of new RegExp("regex") to create a regex.