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- '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);
- };
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