url.hostname
获取和设置网址的主机名部分。
url.host 和 url.hostname 之间的主要区别在于 url.hostname 不包括端口。
const myURL = new URL('https://example.org:81/foo');
console.log(myURL.hostname);
// 打印 example.org
myURL.hostname = 'example.com:82';
console.log(myURL.href);
// 打印 https://example.com:81/foo分配给 hostname 属性的无效主机名值将被忽略。
Gets and sets the host name portion of the URL. The key difference between
url.host and url.hostname is that url.hostname does not include the
port.
const myURL = new URL('https://example.org:81/foo');
console.log(myURL.hostname);
// Prints example.org
myURL.hostname = 'example.com:82';
console.log(myURL.href);
// Prints https://example.com:81/fooInvalid host name values assigned to the hostname property are ignored.