Extract All URLs from a Text String

function extractUrls(text) {
  const urlRegex = /\b((https?:\/\/|www\.)[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/gi;
  return text.match(urlRegex) || [];
}

// Example:
const textWithUrls = "Check out our website: https://example.com and www.google.com. Also, this is a link: http://sub.domain.org/path?query=1#hash";
const urlsFound = extractUrls(textWithUrls);
console.log(urlsFound); // ["https://example.com", "www.google.com", "http://sub.domain.org/path?query=1#hash"]

How it works: This JavaScript function extracts all complete URLs from a given string. The regex `\b((https?:\/\/|www\.)[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])` looks for word boundaries (`\b`) and then matches either `http://`, `https://`, or `www.` followed by common URL characters. The `g` flag ensures all matches are found, and `i` makes it case-insensitive. The `match()` method returns an array of all found URLs or `null` if none are found, which is handled by returning an empty array.