| 'use strict'; |
| |
| /** |
| * Determines whether the specified URL is absolute |
| * |
| * @param {string} url The URL to test |
| * @returns {boolean} True if the specified URL is absolute, otherwise false |
| */ |
| module.exports = function isAbsoluteURL(url) { |
| // A URL is considered absolute if it begins with "<scheme>://" or "//" (protocol-relative URL). |
| // RFC 3986 defines scheme name as a sequence of characters beginning with a letter and followed |
| // by any combination of letters, digits, plus, period, or hyphen. |
| return /^([a-z][a-z\d\+\-\.]*:)?\/\//i.test(url); |
| }; |
