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

title, tags

title	tags
isAbsoluteURL	string,browser,regexp,intermediate

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