公式のノード API ドキュメントから Async Hooks のテスト コードを実行しようとしていますがError: Cannot find module 'async_hooks'、コンソールにエラーが表示されます。私はすでにconst async_hooks = require('async_hooks');スクリプトの先頭に含めています。これが私のコードです：
const async_hooks = require('async_hooks');
// Return the ID of the current execution context.
const eid = async_hooks.executionAsyncId();
// Return the ID of the handle responsible for triggering the callback of the
// current execution scope to call.
const tid = async_hooks.triggerAsyncId();
// Create a new AsyncHook instance. All of these callbacks are optional.
const asyncHook =
async_hooks.createHook({ init, before, after, destroy, promiseResolve });
// Allow callbacks of this AsyncHook instance to call. This is not an implicit
// action after running the constructor, and must be explicitly run to begin
// executing callbacks.
asyncHook.enable();
// Disable listening for new asynchronous events.
asyncHook.disable();
//
// The following are the callbacks that can be passed to createHook().
//
// init is called during object construction. The resource may not have
// completed construction when this callback runs, therefore all fields of the
// resource referenced by "asyncId" may not have been populated.
function init(asyncId, type, triggerAsyncId, resource) { }
// before is called just before the resource's callback is called. It can be
// called 0-N times for handles (e.g. TCPWrap), and will be called exactly 1
// time for requests (e.g. FSReqWrap).
function before(asyncId) { }
// after is called just after the resource's callback has finished.
function after(asyncId) { }
// destroy is called when an AsyncWrap instance is destroyed.
function destroy(asyncId) { }
// promiseResolve is called only for promise resources, when the
// `resolve` function passed to the `Promise` constructor is invoked
// (either directly or through other means of resolving a promise).
function promiseResolve(asyncId) { }
インストールする必要があることに混乱してnpm install async_hooksいますが、それはnodeJsのビルド内モジュールだと思うので、一番上に必要なだけです。