Function resolve

packages/react-error-overlay/fixtures/bundle.mjs:7955–7979

* Resolve a relative URL pathname against a base URL pathname. * * @param {String} relative Pathname of the relative URL. * @param {String} base Pathname of the base URL. * @return {String} Resolved pathname. * @api private

(relative, base)

 * @api private
 */
function resolve(relative, base) {
  var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/'))
    , i = path.length
    , last = path[i - 1]
    , unshift = false
    , up = 0;

  while (i--) {
    if (path[i] === '.') {
      path.splice(i, 1);
    } else if (path[i] === '..') {
      path.splice(i, 1);
      up++;
    } else if (up) {
      if (i === 0) unshift = true;
      path.splice(i, 1);
      up--;
    }
  }

  if (unshift) path.unshift('');
  if (last === '.' || last === '..') path.push('');

  return path.join('/');
}

/**
 * The actual URL instance. Instead of returning an object we've opted-in to