https://github.com/legendecas > https://github.com/tc39/proposal-error-cause

{
  async function doJob() {
    const rawResource = await fetch('//domain/resource-a').catch((err) => {
      throw new Error('Download raw resource failed', { cause: err })
    })
    const jobResult = doComputationalHeavyJob(rawResource)
    await fetch('//domain/upload', { method: 'POST', body: jobResult }).catch((err) => {
      throw new Error('Upload job result failed', { cause: err })
    })
  }

  try {
    await doJob()
  } catch (e) {
    const error = e as unknown as Error
    console.log(error) // Error: Download raw resource failed
    console.log('Caused by', error.cause) // Caused by TypeError: Failed to fetch
  }
}

export {}