30-seconds-of-code/snippets/isAbsoluteURL.md

title, tags, firstSeen, lastUpdated

title	tags	firstSeen	lastUpdated
Check if absolute URL	string,browser,regexp,intermediate	2017-12-31T14:42:45+02:00	2020-10-20T23:02:01+03:00

Checks if the given string is an absolute URL.

• Use RegExp.prototype.test() 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