blob: 22f045fd180fdb7f9d9b3ae9a242310737a1db50 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
/**
* A simple test to determine if a hostname is a properly-formatted domain name
*
* A "valid domain" is defined here: https://url.spec.whatwg.org/#valid-domain
*
* Regex sourced from here:
* https://www.oreilly.com/library/view/regular-expressions-cookbook/9781449327453/ch08s15.html
*/
export function isValidDomain(hostname: string): boolean {
return (
// Consider localhost valid as well since it's okay wrt Secure Contexts
hostname === 'localhost' ||
/^([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,}$/i.test(hostname)
);
}
|
