How can I validate the comma separated urls in a way that accepts subdomains, localhost and allows whitespace before or after the comma? Here’s an example of how I’d like this to work:

const regEx = regex; // working regular expression here
console.log(regEx.test('localhost:3000')); // should return true
console.log(regEx.test('https://google.com,https://jeith.com')); // should return true
console.log(regEx.test('subdomain.jeith.com, localhost:3000')); // should return true
console.log(regEx.test('jeith com')); // should return false because of whitespace not near comma
console.log(regEx.test('jeith.com,,localhost:3000')); // should return false because of double comma

I have an input requesting URLs separated by commas. Usually for something like this, I would split the string by commas and perform the url validation on the individual URLs, but I’m unable to do in this project as I’m doing the validation via zod.

This doesn’t need to be very strict, and validation for .com, .net, http://, ect isn’t needed.

I’m a beginner with regex and this is closest I can get to this validation: /^[A-Za-z]+(?:\s*,\s*[A-Za-z]+)*$/. What’s missing in this expression is the ability to accept : and . for https:// and .com. Other than that, it is successfully returning false if they’re double commas present or whitespace away from the commas.

>Solution :

Take a look at the link below, she already does this and presents you step by step.

RegExr: validation url:

[(http(s)?):\/\/(www\.)?a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)