Method doPoll

packages/engine.io-client/lib/transports/polling-fetch.ts:13–25

()

 */
export class Fetch extends Polling {
  override doPoll() {
    this._fetch()
      .then((res) => {
        if (!res.ok) {
          return this.onError("fetch read error", res.status, res);
        }

        res.text().then((data) => this.onData(data));
      })
      .catch((err) => {
        this.onError("fetch read error", err);
      });
  }

  override doWrite(data: string, callback: () => void) {
    this._fetch(data)