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30-seconds-of-code/snippets/isAbsoluteURL.md
Isabelle Viktoria Maciohsek 821f442bec Remove url tag
2020-10-18 14:19:29 +03:00

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isAbsoluteURL string,browser,intermediate

Returns true if the given string is an absolute URL, false otherwise.

  • Use a regular expression to test if the string is an absolute URL.
const isAbsoluteURL = str => /^[a-z][a-z0-9+.-]*:/.test(str);
isAbsoluteURL('https://google.com'); // true
isAbsoluteURL('ftp://www.myserver.net'); // true
isAbsoluteURL('/foo/bar'); // false