axios.CancelToken deprecation warning causing CI build failures

Direct Resolution

To eliminate the deprecation warning and stop CI build failures, replace axios.CancelToken.source() with the native AbortController API. Pass the controller.signal into the axios request configuration object. This removes the trigger for the console warning while maintaining request cancellation functionality.

Confirmed Facts

• Axios v0.22.0 introduced support for the AbortSignal via the signal config option.
• The CancelToken API began emitting a deprecation warning in axios v0.27.0.
• AbortController is natively available in all modern browsers and Node.js v15.0.0+.

Likely Explanation

The CI failure occurs because axios performs an internal check when CancelToken is instantiated. If the project uses a strict "no-console" policy or treats console.warn as a build error, the deprecation message triggers a pipeline failure even though the code remains logically functional.

Migration Patterns

To minimize disruption, implement a wrapper that abstracts the cancellation logic. This allows you to update the underlying mechanism without changing every call site in the codebase.

// cancellation-provider.js
export function createRequestController() {
  const controller = new AbortController();
  return {
    signal: controller.signal,
    cancel: () => controller.abort(),
  };
}

Implementation:

1. Initialize the controller: const { signal, cancel } = createRequestController();
2. Pass the signal to the request: axios.get('/endpoint', { signal });
3. Invoke cancel() to abort the request.
4. Ensure the .catch() block handles the error using axios.isCancel(error) to distinguish between network failures and intentional cancellations.

Suppression and Shims

Build-time filtering: Since ESLint's no-console rule typically flags the call to console.warn (which happens inside the axios library, not your code), ESLint cannot suppress this. To filter the output in CI, you must wrap the global console.warn in your entry point:

const originalWarn = console.warn;
console.warn = (...args) => {
  if (typeof args[0] === 'string' && args[0].includes('CancelToken is deprecated')) return;
  originalWarn(...args);
};

Version-specific shims: If your environment supports Node.js versions older than v15.0.0, you must install a polyfill (e.g., npm install abort-controller) and import it at the top of your application to ensure AbortController is defined globally.

Missing Diagnostic Detail

To determine if a polyfill is required, please provide the Node.js version used in your CI environment (node -v). If the version is below 15.0.0, the native AbortController approach will throw a ReferenceError.