Na}{

Path: ~//proc/thread-self/root/opt/alt/alt-nodejs10/root/usr/lib/node_modules/npm/html/html/api/

File Content: `async_hooks.md`

# Async Hooks

<!--introduced_in=v8.1.0-->

> Stability: 1 - Experimental

The `async_hooks` module provides an API to register callbacks tracking the
lifetime of asynchronous resources created inside a Node.js application.
It can be accessed using:

```js
const async_hooks = require('async_hooks');
```

## Terminology

An asynchronous resource represents an object with an associated callback.
This callback may be called multiple times, for example, the `'connection'`
event in `net.createServer()`, or just a single time like in `fs.open()`.
A resource can also be closed before the callback is called. `AsyncHook` does
not explicitly distinguish between these different cases but will represent them
as the abstract concept that is a resource.

If [`Worker`][]s are used, each thread has an independent `async_hooks`
interface, and each thread will use a new set of async IDs.

## Public API

### Overview

Following is a simple overview of the public API.

```js
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) { }
```

#### async_hooks.createHook(callbacks)

<!-- YAML
added: v8.1.0
-->

* `callbacks` {Object} The [Hook Callbacks][] to register
  * `init` {Function} The [`init` callback][].
  * `before` {Function} The [`before` callback][].
  * `after` {Function} The [`after` callback][].
  * `destroy` {Function} The [`destroy` callback][].
* Returns: {AsyncHook} Instance used for disabling and enabling hooks

Registers functions to be called for different lifetime events of each async
operation.

The callbacks `init()`/`before()`/`after()`/`destroy()` are called for the
respective asynchronous event during a resource's lifetime.

All callbacks are optional. For example, if only resource cleanup needs to
be tracked, then only the `destroy` callback needs to be passed. The
specifics of all functions that can be passed to `callbacks` is in the
[Hook Callbacks][] section.

```js
const async_hooks = require('async_hooks');

const asyncHook = async_hooks.createHook({
  init(asyncId, type, triggerAsyncId, resource) { },
  destroy(asyncId) { }
});
```

Note that the callbacks will be inherited via the prototype chain:

```js
class MyAsyncCallbacks {
  init(asyncId, type, triggerAsyncId, resource) { }
  destroy(asyncId) {}
}

class MyAddedCallbacks extends MyAsyncCallbacks {
  before(asyncId) { }
  after(asyncId) { }
}

const asyncHook = async_hooks.createHook(new MyAddedCallbacks());
```

##### Error Handling

If any `AsyncHook` callbacks throw, the application will print the stack trace
and exit. The exit path does follow that of an uncaught exception, but
all `'uncaughtException'` listeners are removed, thus forcing the process to
exit. The `'exit'` callbacks will still be called unless the application is run
with `--abort-on-uncaught-exception`, in which case a stack trace will be
printed and the application exits, leaving a core file.

The reason for this error handling behavior is that these callbacks are running
at potentially volatile points in an object's lifetime, for example during
class construction and destruction. Because of this, it is deemed necessary to
bring down the process quickly in order to prevent an unintentional abort in the
future. This is subject to change in the future if a comprehensive analysis is
performed to ensure an exception can follow the normal control flow without
unintentional side effects.

##### Printing in AsyncHooks callbacks

Because printing to the console is an asynchronous operation, `console.log()`
will cause the AsyncHooks callbacks to be called. Using `console.log()` or
similar asynchronous operations inside an AsyncHooks callback function will thus
cause an infinite recursion. An easy solution to this when debugging is to use a
synchronous logging operation such as `fs.writeFileSync(file, msg, flag)`.
This will print to the file and will not invoke AsyncHooks recursively because
it is synchronous.

```js
const fs = require('fs');
const util = require('util');

function debug(...args) {
  // use a function like this one when debugging inside an AsyncHooks callback
  fs.writeFileSync('log.out', `${util.format(...args)}\n`, { flag: 'a' });
}
```

If an asynchronous operation is needed for logging, it is possible to keep
track of what caused the asynchronous operation using the information
provided by AsyncHooks itself. The logging should then be skipped when
it was the logging itself that caused AsyncHooks callback to call. By
doing this the otherwise infinite recursion is broken.

#### asyncHook.enable()

* Returns: {AsyncHook} A reference to `asyncHook`.

Enable the callbacks for a given `AsyncHook` instance. If no callbacks are
provided enabling is a noop.

The `AsyncHook` instance is disabled by default. If the `AsyncHook` instance
should be enabled immediately after creation, the following pattern can be used.

```js
const async_hooks = require('async_hooks');

const hook = async_hooks.createHook(callbacks).enable();
```

#### asyncHook.disable()

* Returns: {AsyncHook} A reference to `asyncHook`.

Disable the callbacks for a given `AsyncHook` instance from the global pool of
`AsyncHook` callbacks to be executed. Once a hook has been disabled it will not
be called again until enabled.

For API consistency `disable()` also returns the `AsyncHook` instance.

#### Hook Callbacks

Key events in the lifetime of asynchronous events have been categorized into
four areas: instantiation, before/after the callback is called, and when the
instance is destroyed.

##### init(asyncId, type, triggerAsyncId, resource)

* `asyncId` {number} A unique ID for the async resource.
* `type` {string} The type of the async resource.
* `triggerAsyncId` {number} The unique ID of the async resource in whose
  execution context this async resource was created.
* `resource` {Object} Reference to the resource representing the async
  operation, needs to be released during _destroy_.

Called when a class is constructed that has the _possibility_ to emit an
asynchronous event. This _does not_ mean the instance must call
`before`/`after` before `destroy` is called, only that the possibility
exists.

This behavior can be observed by doing something like opening a resource then
closing it before the resource can be used. The following snippet demonstrates
this.

```js
require('net').createServer().listen(function() { this.close(); });
// OR
clearTimeout(setTimeout(() => {}, 10));
```

Every new resource is assigned an ID that is unique within the scope of the
current Node.js instance.

###### `type`

The `type` is a string identifying the type of resource that caused
`init` to be called. Generally, it will correspond to the name of the
resource's constructor.

```text
FSEVENTWRAP, FSREQWRAP, GETADDRINFOREQWRAP, GETNAMEINFOREQWRAP, HTTPPARSER,
JSSTREAM, PIPECONNECTWRAP, PIPEWRAP, PROCESSWRAP, QUERYWRAP, SHUTDOWNWRAP,
SIGNALWRAP, STATWATCHER, TCPCONNECTWRAP, TCPSERVERWRAP, TCPWRAP, TIMERWRAP,
TTYWRAP, UDPSENDWRAP, UDPWRAP, WRITEWRAP, ZLIB, SSLCONNECTION, PBKDF2REQUEST,
RANDOMBYTESREQUEST, TLSWRAP, Timeout, Immediate, TickObject
```

There is also the `PROMISE` resource type, which is used to track `Promise`
instances and asynchronous work scheduled by them.

Users are able to define their own `type` when using the public embedder API.

It is possible to have type name collisions. Embedders are encouraged to use
unique prefixes, such as the npm package name, to prevent collisions when
listening to the hooks.

###### `triggerAsyncId`

`triggerAsyncId` is the `asyncId` of the resource that caused (or "triggered")
the new resource to initialize and that caused `init` to call. This is different
from `async_hooks.executionAsyncId()` that only shows *when* a resource was
created, while `triggerAsyncId` shows *why* a resource was created.

The following is a simple demonstration of `triggerAsyncId`:

```js
async_hooks.createHook({
  init(asyncId, type, triggerAsyncId) {
    const eid = async_hooks.executionAsyncId();
    fs.writeSync(
      1, `${type}(${asyncId}): trigger: ${triggerAsyncId} execution: ${eid}\n`);
  }
}).enable();

require('net').createServer((conn) => {}).listen(8080);
```

Output when hitting the server with `nc localhost 8080`:

```console
TCPSERVERWRAP(5): trigger: 1 execution: 1
TCPWRAP(7): trigger: 5 execution: 0
```

The `TCPSERVERWRAP` is the server which receives the connections.

The `TCPWRAP` is the new connection from the client. When a new
connection is made, the `TCPWrap` instance is immediately constructed. This
happens outside of any JavaScript stack. (An `executionAsyncId()` of `0` means
that it is being executed from C++ with no JavaScript stack above it.) With only
that information, it would be impossible to link resources together in
terms of what caused them to be created, so `triggerAsyncId` is given the task
of propagating what resource is responsible for the new resource's existence.

###### `resource`

`resource` is an object that represents the actual async resource that has
been initialized. This can contain useful information that can vary based on
the value of `type`. For instance, for the `GETADDRINFOREQWRAP` resource type,
`resource` provides the hostname used when looking up the IP address for the
host in `net.Server.listen()`. The API for accessing this information is
currently not considered public, but using the Embedder API, users can provide
and document their own resource objects. For example, such a resource object
could contain the SQL query being executed.

In the case of Promises, the `resource` object will have `promise` property
that refers to the `Promise` that is being initialized, and an
`isChainedPromise` property, set to `true` if the promise has a parent promise,
and `false` otherwise. For example, in the case of `b = a.then(handler)`, `a` is
considered a parent `Promise` of `b`. Here, `b` is considered a chained promise.

In some cases the resource object is reused for performance reasons, it is
thus not safe to use it as a key in a `WeakMap` or add properties to it.

###### Asynchronous context example

The following is an example with additional information about the calls to
`init` between the `before` and `after` calls, specifically what the
callback to `listen()` will look like. The output formatting is slightly more
elaborate to make calling context easier to see.

```js
let indent = 0;
async_hooks.createHook({
  init(asyncId, type, triggerAsyncId) {
    const eid = async_hooks.executionAsyncId();
    const indentStr = ' '.repeat(indent);
    fs.writeSync(
      1,
      `${indentStr}${type}(${asyncId}):` +
      ` trigger: ${triggerAsyncId} execution: ${eid}\n`);
  },
  before(asyncId) {
    const indentStr = ' '.repeat(indent);
    fs.writeFileSync('log.out',
                     `${indentStr}before:  ${asyncId}\n`, { flag: 'a' });
    indent += 2;
  },
  after(asyncId) {
    indent -= 2;
    const indentStr = ' '.repeat(indent);
    fs.writeFileSync('log.out',
                     `${indentStr}after:  ${asyncId}\n`, { flag: 'a' });
  },
  destroy(asyncId) {
    const indentStr = ' '.repeat(indent);
    fs.writeFileSync('log.out',
                     `${indentStr}destroy:  ${asyncId}\n`, { flag: 'a' });
  },
}).enable();

require('net').createServer(() => {}).listen(8080, () => {
  // Let's wait 10ms before logging the server started.
  setTimeout(() => {
    console.log('>>>', async_hooks.executionAsyncId());
  }, 10);
});
```

Output from only starting the server:

```console
TCPSERVERWRAP(5): trigger: 1 execution: 1
TickObject(6): trigger: 5 execution: 1
before:  6
  Timeout(7): trigger: 6 execution: 6
after:   6
destroy: 6
before:  7
>>> 7
  TickObject(8): trigger: 7 execution: 7
after:   7
before:  8
after:   8
```

As illustrated in the example, `executionAsyncId()` and `execution` each specify
the value of the current execution context; which is delineated by calls to
`before` and `after`.

Only using `execution` to graph resource allocation results in the following:

```console
Timeout(7) -> TickObject(6) -> root(1)
```

The `TCPSERVERWRAP` is not part of this graph, even though it was the reason for
`console.log()` being called. This is because binding to a port without a
hostname is a *synchronous* operation, but to maintain a completely asynchronous
API the user's callback is placed in a `process.nextTick()`.

The graph only shows *when* a resource was created, not *why*, so to track
the *why* use `triggerAsyncId`.

##### before(asyncId)

* `asyncId` {number}

When an asynchronous operation is initiated (such as a TCP server receiving a
new connection) or completes (such as writing data to disk) a callback is
called to notify the user. The `before` callback is called just before said
callback is executed. `asyncId` is the unique identifier assigned to the
resource about to execute the callback.

The `before` callback will be called 0 to N times. The `before` callback
will typically be called 0 times if the asynchronous operation was cancelled
or, for example, if no connections are received by a TCP server. Persistent
asynchronous resources like a TCP server will typically call the `before`
callback multiple times, while other operations like `fs.open()` will call
it only once.

##### after(asyncId)

* `asyncId` {number}

Called immediately after the callback specified in `before` is completed.

If an uncaught exception occurs during execution of the callback, then `after`
will run *after* the `'uncaughtException'` event is emitted or a `domain`'s
handler runs.

##### destroy(asyncId)

* `asyncId` {number}

Called after the resource corresponding to `asyncId` is destroyed. It is also
called asynchronously from the embedder API `emitDestroy()`.

Some resources depend on garbage collection for cleanup, so if a reference is
made to the `resource` object passed to `init` it is possible that `destroy`
will never be called, causing a memory leak in the application. If the resource
does not depend on garbage collection, then this will not be an issue.

##### promiseResolve(asyncId)

* `asyncId` {number}

Called when the `resolve` function passed to the `Promise` constructor is
invoked (either directly or through other means of resolving a promise).

Note that `resolve()` does not do any observable synchronous work.

The `Promise` is not necessarily fulfilled or rejected at this point if the
`Promise` was resolved by assuming the state of another `Promise`.

```js
new Promise((resolve) => resolve(true)).then((a) => {});
```

calls the following callbacks:

```text
init for PROMISE with id 5, trigger id: 1
  promise resolve 5      # corresponds to resolve(true)
init for PROMISE with id 6, trigger id: 5  # the Promise returned by then()
  before 6               # the then() callback is entered
  promise resolve 6      # the then() callback resolves the promise by returning
  after 6
```

#### async_hooks.executionAsyncId()

<!-- YAML
added: v8.1.0
changes:
  - version: v8.2.0
    pr-url: https://github.com/nodejs/node/pull/13490
    description: Renamed from `currentId`
-->

* Returns: {number} The `asyncId` of the current execution context. Useful to
  track when something calls.

```js
const async_hooks = require('async_hooks');

console.log(async_hooks.executionAsyncId());  // 1 - bootstrap
fs.open(path, 'r', (err, fd) => {
  console.log(async_hooks.executionAsyncId());  // 6 - open()
});
```

The ID returned from `executionAsyncId()` is related to execution timing, not
causality (which is covered by `triggerAsyncId()`):

```js
const server = net.createServer((conn) => {
  // Returns the ID of the server, not of the new connection, because the
  // callback runs in the execution scope of the server's MakeCallback().
  async_hooks.executionAsyncId();

}).listen(port, () => {
  // Returns the ID of a TickObject (i.e. process.nextTick()) because all
  // callbacks passed to .listen() are wrapped in a nextTick().
  async_hooks.executionAsyncId();
});
```

Note that promise contexts may not get precise `executionAsyncIds` by default.
See the section on [promise execution tracking][].

#### async_hooks.triggerAsyncId()

* Returns: {number} The ID of the resource responsible for calling the callback
  that is currently being executed.

```js
const server = net.createServer((conn) => {
  // The resource that caused (or triggered) this callback to be called
  // was that of the new connection. Thus the return value of triggerAsyncId()
  // is the asyncId of "conn".
  async_hooks.triggerAsyncId();

}).listen(port, () => {
  // Even though all callbacks passed to .listen() are wrapped in a nextTick()
  // the callback itself exists because the call to the server's .listen()
  // was made. So the return value would be the ID of the server.
  async_hooks.triggerAsyncId();
});
```

Note that promise contexts may not get valid `triggerAsyncId`s by default. See
the section on [promise execution tracking][].

## Promise execution tracking

By default, promise executions are not assigned `asyncId`s due to the relatively
expensive nature of the [promise introspection API][PromiseHooks] provided by
V8. This means that programs using promises or `async`/`await` will not get
correct execution and trigger ids for promise callback contexts by default.

```js
const ah = require('async_hooks');
Promise.resolve(1729).then(() => {
  console.log(`eid ${ah.executionAsyncId()} tid ${ah.triggerAsyncId()}`);
});
// produces:
// eid 1 tid 0
```

Observe that the `then()` callback claims to have executed in the context of the
outer scope even though there was an asynchronous hop involved. Also note that
the `triggerAsyncId` value is `0`, which means that we are missing context about
the resource that caused (triggered) the `then()` callback to be executed.

Installing async hooks via `async_hooks.createHook` enables promise execution
tracking:

```js
const ah = require('async_hooks');
ah.createHook({ init() {} }).enable(); // forces PromiseHooks to be enabled.
Promise.resolve(1729).then(() => {
  console.log(`eid ${ah.executionAsyncId()} tid ${ah.triggerAsyncId()}`);
});
// produces:
// eid 7 tid 6
```

In this example, adding any actual hook function enabled the tracking of
promises. There are two promises in the example above; the promise created by
`Promise.resolve()` and the promise returned by the call to `then()`. In the
example above, the first promise got the `asyncId` `6` and the latter got
`asyncId` `7`. During the execution of the `then()` callback, we are executing
in the context of promise with `asyncId` `7`. This promise was triggered by
async resource `6`.

Another subtlety with promises is that `before` and `after` callbacks are run
only on chained promises. That means promises not created by `then()`/`catch()`
will not have the `before` and `after` callbacks fired on them. For more details
see the details of the V8 [PromiseHooks][] API.

## JavaScript Embedder API

Library developers that handle their own asynchronous resources performing tasks
like I/O, connection pooling, or managing callback queues may use the
`AsyncWrap` JavaScript API so that all the appropriate callbacks are called.

### Class: AsyncResource

The class `AsyncResource` is designed to be extended by the embedder's async
resources. Using this, users can easily trigger the lifetime events of their
own resources.

The `init` hook will trigger when an `AsyncResource` is instantiated.

The following is an overview of the `AsyncResource` API.

```js
const { AsyncResource, executionAsyncId } = require('async_hooks');

// AsyncResource() is meant to be extended. Instantiating a
// new AsyncResource() also triggers init. If triggerAsyncId is omitted then
// async_hook.executionAsyncId() is used.
const asyncResource = new AsyncResource(
  type, { triggerAsyncId: executionAsyncId(), requireManualDestroy: false }
);

// Run a function in the execution context of the resource. This will
// * establish the context of the resource
// * trigger the AsyncHooks before callbacks
// * call the provided function `fn` with the supplied arguments
// * trigger the AsyncHooks after callbacks
// * restore the original execution context
asyncResource.runInAsyncScope(fn, thisArg, ...args);

// Call AsyncHooks destroy callbacks.
asyncResource.emitDestroy();

// Return the unique ID assigned to the AsyncResource instance.
asyncResource.asyncId();

// Return the trigger ID for the AsyncResource instance.
asyncResource.triggerAsyncId();
```

#### new AsyncResource(type[, options])

* `type` {string} The type of async event.
* `options` {Object}
  * `triggerAsyncId` {number} The ID of the execution context that created this
  async event. **Default:** `executionAsyncId()`.
  * `requireManualDestroy` {boolean} Disables automatic `emitDestroy` when the
  object is garbage collected. This usually does not need to be set (even if
  `emitDestroy` is called manually), unless the resource's `asyncId` is
  retrieved and the sensitive API's `emitDestroy` is called with it.
  **Default:** `false`.

Example usage:

```js
class DBQuery extends AsyncResource {
  constructor(db) {
    super('DBQuery');
    this.db = db;
  }

  getInfo(query, callback) {
    this.db.get(query, (err, data) => {
      this.runInAsyncScope(callback, null, err, data);
    });
  }

  close() {
    this.db = null;
    this.emitDestroy();
  }
}
```

#### asyncResource.runInAsyncScope(fn[, thisArg, ...args])
<!-- YAML
added: v9.6.0
-->

* `fn` {Function} The function to call in the execution context of this async
  resource.
* `thisArg` {any} The receiver to be used for the function call.
* `...args` {any} Optional arguments to pass to the function.

Call the provided function with the provided arguments in the execution context
of the async resource. This will establish the context, trigger the AsyncHooks
before callbacks, call the function, trigger the AsyncHooks after callbacks, and
then restore the original execution context.

#### asyncResource.emitBefore()
<!-- YAML
deprecated: v9.6.0
-->
> Stability: 0 - Deprecated: Use [`asyncResource.runInAsyncScope()`][] instead.

Call all `before` callbacks to notify that a new asynchronous execution context
is being entered. If nested calls to `emitBefore()` are made, the stack of
`asyncId`s will be tracked and properly unwound.

`before` and `after` calls must be unwound in the same order that they
are called. Otherwise, an unrecoverable exception will occur and the process
will abort. For this reason, the `emitBefore` and `emitAfter` APIs are
considered deprecated. Please use `runInAsyncScope`, as it provides a much safer
alternative.

#### asyncResource.emitAfter()
<!-- YAML
deprecated: v9.6.0
-->
> Stability: 0 - Deprecated: Use [`asyncResource.runInAsyncScope()`][] instead.

Call all `after` callbacks. If nested calls to `emitBefore()` were made, then
make sure the stack is unwound properly. Otherwise an error will be thrown.

If the user's callback throws an exception, `emitAfter()` will automatically be
called for all `asyncId`s on the stack if the error is handled by a domain or
`'uncaughtException'` handler.

`before` and `after` calls must be unwound in the same order that they
are called. Otherwise, an unrecoverable exception will occur and the process
will abort. For this reason, the `emitBefore` and `emitAfter` APIs are
considered deprecated. Please use `runInAsyncScope`, as it provides a much safer
alternative.

#### asyncResource.emitDestroy()

* Returns: {AsyncResource} A reference to `asyncResource`.

Call all `destroy` hooks. This should only ever be called once. An error will
be thrown if it is called more than once. This **must** be manually called. If
the resource is left to be collected by the GC then the `destroy` hooks will
never be called.

#### asyncResource.asyncId()

* Returns: {number} The unique `asyncId` assigned to the resource.

#### asyncResource.triggerAsyncId()

* Returns: {number} The same `triggerAsyncId` that is passed to the
`AsyncResource` constructor.

[`Worker`]: worker_threads.html#worker_threads_class_worker
[`after` callback]: #async_hooks_after_asyncid
[`asyncResource.runInAsyncScope()`]: #async_hooks_asyncresource_runinasyncscope_fn_thisarg_args
[`before` callback]: #async_hooks_before_asyncid
[`destroy` callback]: #async_hooks_destroy_asyncid
[`init` callback]: #async_hooks_init_asyncid_type_triggerasyncid_resource
[Hook Callbacks]: #async_hooks_hook_callbacks
[PromiseHooks]: https://docs.google.com/document/d/1rda3yKGHimKIhg5YeoAmCOtyURgsbTH_qaYR79FELlk/edit
[promise execution tracking]: #async_hooks_promise_execution_tracking

Edit Rename Chmod Delete

FILE FOLDER

Name	Size	Permission
assets	---	0755
addons.html	54165 bytes	0644
addons.json	49169 bytes	0644
addons.md	39875 bytes	0644
all.html	3317453 bytes	0644
all.json	3779566 bytes	0644
assert.html	73870 bytes	0644
assert.json	67076 bytes	0644
assert.md	39332 bytes	0644
async_hooks.html	48103 bytes	0644
async_hooks.json	46905 bytes	0644
async_hooks.md	26243 bytes	0644
buffer.html	171606 bytes	0644
buffer.json	212317 bytes	0644
buffer.md	86127 bytes	0644
child_process.html	113155 bytes	0644
child_process.json	121182 bytes	0644
child_process.md	58585 bytes	0644
cli.html	50554 bytes	0644
cli.json	51418 bytes	0644
cli.md	23543 bytes	0644
cluster.html	47484 bytes	0644
cluster.json	44092 bytes	0644
cluster.md	24006 bytes	0644
console.html	42023 bytes	0644
console.json	40989 bytes	0644
console.md	16500 bytes	0644
crypto.html	216539 bytes	0644
crypto.json	225260 bytes	0644
crypto.md	105426 bytes	0644
debugger.html	15783 bytes	0644
debugger.json	9229 bytes	0644
debugger.md	6045 bytes	0644
deprecations.html	108106 bytes	0644
deprecations.json	124813 bytes	0644
deprecations.md	61337 bytes	0644
dgram.html	49594 bytes	0644
dgram.json	46192 bytes	0644
dgram.md	22115 bytes	0644
dns.html	87362 bytes	0644
dns.json	84393 bytes	0644
dns.md	40095 bytes	0644
documentation.html	12349 bytes	0644
documentation.json	5175 bytes	0644
documentation.md	3751 bytes	0644
domain.html	27909 bytes	0644
domain.json	22366 bytes	0644
domain.md	15529 bytes	0644
errors.html	169171 bytes	0644
errors.json	156231 bytes	0644
errors.md	69652 bytes	0644
esm.html	17537 bytes	0644
esm.json	11472 bytes	0644
esm.md	7090 bytes	0644
events.html	44466 bytes	0644
events.json	40641 bytes	0644
events.md	20453 bytes	0644
fs.html	346935 bytes	0644
fs.json	350029 bytes	0644
fs.md	156195 bytes	0644
globals.html	15680 bytes	0644
globals.json	15284 bytes	0644
globals.md	4206 bytes	0644
http.html	127051 bytes	0644
http.json	153406 bytes	0644
http.md	65406 bytes	0644
http2.html	214210 bytes	0644
http2.json	255233 bytes	0644
http2.md	115234 bytes	0644
https.html	27951 bytes	0644
https.json	32145 bytes	0644
https.md	11656 bytes	0644
index.html	9387 bytes	0644
index.json	54 bytes	0644
index.md	1608 bytes	0644
inspector.html	18311 bytes	0644
inspector.json	12261 bytes	0644
inspector.md	6092 bytes	0644
intl.html	21273 bytes	0644
intl.json	15197 bytes	0644
intl.md	11094 bytes	0644
modules.html	49079 bytes	0644
modules.json	44167 bytes	0644
modules.md	26624 bytes	0644
n-api.html	264179 bytes	0644
n-api.json	288748 bytes	0644
n-api.md	177376 bytes	0644
net.html	88202 bytes	0644
net.json	95520 bytes	0644
net.md	38566 bytes	0644
os.html	55947 bytes	0644
os.json	52122 bytes	0644
os.md	35314 bytes	0644
path.html	32930 bytes	0644
path.json	27780 bytes	0644
path.md	14134 bytes	0644
perf_hooks.html	33347 bytes	0644
perf_hooks.json	26332 bytes	0644
perf_hooks.md	12077 bytes	0644
process.html	119860 bytes	0644
process.json	116225 bytes	0644
process.md	68291 bytes	0644
punycode.html	15208 bytes	0644
punycode.json	8810 bytes	0644
punycode.md	4148 bytes	0644
querystring.html	17520 bytes	0644
querystring.json	12525 bytes	0644
querystring.md	5369 bytes	0644
readline.html	40537 bytes	0644
readline.json	38816 bytes	0644
readline.md	18367 bytes	0644
repl.html	39456 bytes	0644
repl.json	37800 bytes	0644
repl.md	19966 bytes	0644
stream.html	152282 bytes	0644
stream.json	177657 bytes	0644
stream.md	89797 bytes	0644
string_decoder.html	12804 bytes	0644
string_decoder.json	5753 bytes	0644
string_decoder.md	2814 bytes	0644
synopsis.html	10419 bytes	0644
synopsis.json	3541 bytes	0644
synopsis.md	2750 bytes	0644
timers.html	23419 bytes	0644
timers.json	20462 bytes	0644
timers.md	8719 bytes	0644
tls.html	111254 bytes	0644
tls.json	125071 bytes	0644
tls.md	61785 bytes	0644
tracing.html	17202 bytes	0644
tracing.json	11706 bytes	0644
tracing.md	6455 bytes	0644
tty.html	21477 bytes	0644
tty.json	17771 bytes	0644
tty.md	7022 bytes	0644
url.html	78006 bytes	0644
url.json	77016 bytes	0644
url.md	42643 bytes	0644
util.html	132295 bytes	0644
util.json	148178 bytes	0644
util.md	61619 bytes	0644
v8.html	35296 bytes	0644
v8.json	32157 bytes	0644
v8.md	12497 bytes	0644
vm.html	74810 bytes	0644
vm.json	79589 bytes	0644
vm.md	39839 bytes	0644
worker_threads.html	35883 bytes	0644
worker_threads.json	32176 bytes	0644
worker_threads.md	17075 bytes	0644
zlib.html	77680 bytes	0644
zlib.json	99038 bytes	0644
zlib.md	31791 bytes	0644

File Content: async_hooks.md

File Content: `async_hooks.md`