What error is thrown when a fetch is aborted?

test.js

// Paste in your DevTools console to inspect the error object thrown by fetch
const controller = new AbortController()
fetch(window.location.href, {signal: controller.signal}).catch((err) => {
  console.dir(err)
  console.assert(err.name === 'AbortError', `${err.name} === 'AbortError'`)
  console.assert(err.code === 20, `${err.code} === 20`)
  console.assert(
    err.message === 'The user aborted a request.',
    `${err.message} === 'The user aborted a request.'`
  )
  console.assert(err instanceof DOMException, `err instanceof DOMException`)
  console.assert(err instanceof Error, `err instanceof Error`)
  console.assert(
    err.toString() === 'AbortError: The user aborted a request.',
    `err.toString() === 'AbortError: The user aborted a request.'`
  )
  console.assert(
    Object.prototype.toString.call(err) === '[object DOMException]',
    `Object.prototype.toString.call(err) === '[object DOMException]'`
  )
})
controller.abort()