functionfoundry/fn/isurl.js

Pure function JavaScript library

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isurl;
// Copyright 2015 JC Fisher

// ISURL returns true when the value matches the regex for a uniform resource locator.
function isurl(str) {
  // credit: http://stackoverflow.com/questions/5717093/check-if-a-javascript-string-is-an-url
  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);
}
module.exports = exports['default'];