New source found from dndbeyond.com

ddb_main/node_modules/axios/lib/helpers/isAbsoluteURL.js

@@ -4,11 +4,16 @@
  * 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) {
+export default 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.
+  if (typeof url !== 'string') {
+    return false;
+  }
+
   return /^([a-z][a-z\d+\-.]*:)?\/\//i.test(url);
-};
+}