runAll

Problem

You need to invoke a list of callbacks — teardown functions, event listeners, or cleanup handlers — and collect all errors instead of stopping on the first failure.

Solution

Use runAll(fns, options?) to call every function in the array. If any throw, the errors are collected into an AggregateError thrown after all functions have run.

import { runAll } from '@vielzeug/arsenal';

const cleanups = [() => socket.close(), () => db.disconnect(), () => timer.cancel()];

try {
  runAll(cleanups, { reverse: true }); // reverse: true for teardown-safe LIFO order
} catch (err) {
  if (err instanceof AggregateError) {
    console.error('cleanup errors', err.errors);
  }
}

Pitfalls

• runAll always throws AggregateError (never plain Error) when any callback fails.
• { reverse: true } runs in LIFO order, which matches typical teardown semantics.

Related

• once
• pipe