WHATWG URL API: base ignored if relative path starts with a double slash #30776

const foo = new URL('//foo/bar', 'http://fake');

URL {
  href: 'http://fake//foo/bar',
  origin: 'http://fake',
  protocol: 'http:',
  username: '',
  password: '',
  host: 'fake',
  hostname: 'fake',
  port: '',
  pathname: '//foo/bar',
  search: '',
  searchParams: URLSearchParams {},
  hash: ''
}

URL {
  href: 'http://foo/bar',
  origin: 'http://foo',
  protocol: 'http:',
  username: '',
  password: '',
  host: 'foo',
  hostname: 'foo',
  port: '',
  pathname: '/bar',
  search: '',
  searchParams: URLSearchParams {},
  hash: ''
}