Function resolveUrl

packages/router/upgrade/src/upgrade.ts:144–156

(url: string)

 */
let anchor: HTMLAnchorElement | undefined;
function resolveUrl(url: string): {pathname: string; search: string; hash: string} {
  anchor ??= document.createElement('a');

  anchor.setAttribute('href', url);
  anchor.setAttribute('href', anchor.href);

  return {
    // IE does not start `pathname` with `/` like other browsers.
    pathname: `/${anchor.pathname.replace(/^\//, '')}`,
    search: anchor.search,
    hash: anchor.hash,
  };
}