isurl.js

export default function isurl(str) {

  var pattern = new RegExp(
    "^(https?:\\/\\/)?" + // protocol
    "((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.?)+[a-z]{2,}|" + // domain name
    "((\\d{1,3}\\.){3}\\d{1,3}))" + // OR ip (v4) address
    "(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*" + // port and path
    "(\\?[;&a-z\\d%_.~+=-]*)?" + // query string
      "(\\#[-a-z\\d_]*)?$",
    "i"
  ); // fragment locator
  return pattern.test(str);
}