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30-seconds-of-code/snippets/isAbsoluteURL.md
2020-04-16 23:07:33 +03:00

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title, tags
title tags
isAbsoluteURL string,browser,url,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