Regex to validate domain name
・0 min read
Using a regular expression to check if it is a valid domain.
function isValidDomain(v) {
if (!v) return false;
var re = /^(?!:\/\/)([a-zA-Z0-9-]+\.){0,5}[a-zA-Z0-9-][a-zA-Z0-9-]+\.[a-zA-Z]{2,64}?$/gi;
return re.test(v);
}
Usage
isValidDomain('example.com') // true
isValidDomain('foo.example.com') // true
isValidDomain('bar.foo.example.com') // true
isValidDomain('exa-mple.co.uk') // true
isValidDomain('exa_mple.com') // false
isValidDomain('example') // false
isValidDomain('ex*mple.com') // false
isValidDomain(3434) // false
On github at miguelmota/is-valid-domain