同源URL

检查两个URL是否属于同源。

• 使用URL.protocol和URL.host来检查两个URL是否具有相同的协议和主机。

const isSameOrigin = (origin, destination) =>
  origin.protocol === destination.protocol && origin.host === destination.host;

const origin = new URL('https://www.30secondsofcode.org/about');
const destination = new URL('https://www.30secondsofcode.org/contact');
isSameOrigin(origin, destination); // true
const other = new URL('https://developer.mozilla.org');
isSameOrigin(origin, other); // false