30-seconds-of-code/javascript/snippets/is-absolute-url.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Check if absolute URL	snippet	string browser regexp	coffee-phone-tray-2	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