Function devirtualizeURL

packages/react-server/src/ReactFlightServer.js:184–197

(url: string)

}

function devirtualizeURL(url: string): string {
  if (url.startsWith('about://React/')) {
    // This callsite is a virtual fake callsite that came from another Flight client.
    // We need to reverse it back into the original location by stripping its prefix
    // and suffix. We don't need the environment name because it's available on the
    // parent object that will contain the stack.
    const envIdx = url.indexOf('/', 'about://React/'.length);
    const suffixIdx = url.lastIndexOf('?');
    if (envIdx > -1 && suffixIdx > -1) {
      return decodeURI(url.slice(envIdx + 1, suffixIdx));
    }
  }
  return url;
}

function isPromiseCreationInternal(url: string, functionName: string): boolean {
  // Various internals of the JS VM can create Promises but the call frame of the