Function handleOutput

packages/cli/src/commands/preview.ts:726–736

(data: Buffer)

  let detected = false;

  function handleOutput(data: Buffer): void {
    const url = data.toString().match(/Local:\s+(http:\/\/localhost:\d+)/)?.[1];
    if (!url || detected) return;

    detected = true;
    spinner.stop(c.success("Studio running"));
    printStudioSummary(projectName, url, { footer: "Press Ctrl+C to stop" });
    openStudioBrowser(url, projectName, options);
    child.stdout.removeListener("data", handleOutput);
    child.stderr.removeListener("data", handleOutput);
  }

  child.stdout.on("data", handleOutput);
  child.stderr.on("data", handleOutput);