[TypeError: signal.throwIfAborted is not a function (it is undefined)] in React Native context

[P Sam]

Upgrading from 0.31.4 to 1.2.3.

Here are my traces:

 LOG  signal {}
 LOG  signal.reason undefined
 LOG  signal.aborted false
 LOG  signal.onabort null
 LOG  signal.throwIfAborted undefined
 LOG  signal.addEventListener [Function addEventListener]
 LOG  signal.removeEventListener [Function removeEventListener]

These are conformant with the definitions found in node_modules\react-native\types\modules\globals.d.ts

Extracts:

declare class AbortSignal implements EventTarget {
  readonly aborted: boolean;
  onabort: (event: AbortEvent) => void;
  addEventListener: (
  removeEventListener: (

[Sindre Sorhus]

This is a problem with React Native and should be reported there instead.

[Andre de Waard]

@psam44 Found a solution?

[P Sam]

@andredewaard No solution. My conclusion is to come back to v0.33 for now, and plan for elimination, as supporting this package in react-native doesn't seem to be an objective and I don't expect RN to fully implement the AbortSignal API.

[Andre de Waard]

Alright, thanks for the heads up, i reverted back to using native Fetch instead.

[ibash-corpusant]

You can polyfill:

// polyfill throwIfAborted which seems to be missing in react-native, but ky
// uses it
//
// Fun fact, AbortSignal here is just a react-native polyfill, too:
// https://github.com/facebook/react-native/blob/838d26d7b534133e75c7fa673dfc849b0e64c9d3/packages/react-native/Libraries/Core/setUpXHR.js#L38
//
// Unfortunately it doesn't have a `reason`
//
// ref: https://github.com/tjmehta/fast-abort-controller/blob/42588908035d1512f90e7299a2c70dfb708f9620/src/FastAbortSignal.ts#L39
if (!AbortSignal.prototype.throwIfAborted) {
AbortSignal.prototype.throwIfAborted = function() {
    if (this.aborted) {
      throw new Error('Aborted')
    }
  }
}