JS Regex url validation

Question

I tried to validate url with or without http No matter what i did the function return false. I checked my regex string in this site: http://regexr.com/ And its seen as i expect.

Answer 1

Actually, this question needs a powerful regex and the following code is not very hard to understand, please see below(ES6):

const isValidUrl = urlString => {
  const urlRegex = /^((http(s?)?):\/\/)?([wW]{3}\.)?[a-zA-Z0-9\-.]+\.[a-zA-Z]{2,}(\.[a-zA-Z]{2,})?$/g;
  const result = urlString.match(urlRegex);
  return result !== null;
};