URLPattern.hostname

The hostname property of the URLPattern interface is a USVString containing the pattern used to match the hostname part of a URL. This value may differ from the input to the constructor due to normalization.

A USVString.

The below example creates a URLPattern object with *.example.org for the hostname part. This pattern matches any hostname that is a direct subdomain of example.org.

const pattern = new URLPattern('https://*.example.org');
console.log(pattern.hostname); // '*.example.org'