cancel_token

Cancel Dart Futures and share a CancelToken across requests.

When to use

Abort in-flight work when a host (screen, session, scope) is disposed
Share one cancel signal across HTTP and tracked futures
Nest per-request tokens under a parent that cancels children together

API

Type	Role
`CancelToken`	Cancel signal; `whenCancel`, `track`, child `link` / `linkWhile`
`CancelableScope`	Owns tokens for a lifetime; `run` / `dispose` / `cancel`
`CancelledException`	Thrown when a scoped `run` is cancelled before completion
`Cancelable`	Interface implemented by tokens and scopes

Usage

final scope = CancelableScope();

final value = await scope.run((token) async {
  // Pass token into your HTTP / fetch layer (await token.whenCancel, etc.).
  return fetchSomething(cancelToken: token);
});

// Later — abort everything still registered with the scope:
scope.dispose();

Runnable console demo: