URLPattern.protocol

The protocol property of the URLPattern interface is a USVString containing the pattern used to match the protocol 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 http{s}? for the protocol part. This pattern matches the http and https protocols.

const pattern = new URLPattern({ protocol: 'http{s}?' });
console.log(pattern.protocol); // 'http{s}?'