Global objects

Ajouté en: v0.10.0

These objects are available in all modules. The following variables may appear to be global but are not. They exist only in the scope of modules, see the module system documentation:

• __dirname
• __filename
• exports
• module
• require()

The objects listed here are specific to Node.js. There are built-in objects that are part of the JavaScript language itself, which are also globally accessible.

C AbortController

A utility class used to signal cancelation in selected Promise-based APIs. The API is based on the Web API AbortController.

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M abortController.abort([reason])

• reason any An optional reason, retrievable on the AbortSignal's reason property.

Triggers the abort signal, causing the abortController.signal to emit the 'abort' event.

M abortController.signal

Ajouté en: v15.0.0, v14.17.0

• Type: AbortSignal

C AbortSignal

Ajouté en: v15.0.0, v14.17.0

• Extends: EventTarget

The AbortSignal is used to notify observers when the abortController.abort() method is called.

Static method: AbortSignal.abort([reason])

• reason: any
• Returns: AbortSignal

Returns a new already aborted AbortSignal.

Static method: AbortSignal.timeout(delay)

Ajouté en: v17.3.0, v16.14.0

• delay number The number of milliseconds to wait before triggering the AbortSignal.

Returns a new AbortSignal which will be aborted in delay milliseconds.

E 'abort'

Ajouté en: v15.0.0, v14.17.0

The 'abort' event is emitted when the abortController.abort() method is called. The callback is invoked with a single object argument with a single type property set to 'abort':

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The AbortController with which the AbortSignal is associated will only ever trigger the 'abort' event once. We recommended that code check that the abortSignal.aborted attribute is false before adding an 'abort' event listener.

Any event listeners attached to the AbortSignal should use the { once: true } option (or, if using the EventEmitter APIs to attach a listener, use the once() method) to ensure that the event listener is removed as soon as the 'abort' event is handled. Failure to do so may result in memory leaks.

M abortSignal.aborted

Ajouté en: v15.0.0, v14.17.0

• Type: boolean True after the AbortController has been aborted.

M abortSignal.onabort

Ajouté en: v15.0.0, v14.17.0

• Type: Function

An optional callback function that may be set by user code to be notified when the abortController.abort() function has been called.

M abortSignal.reason

Ajouté en: v17.2.0, v16.14.0

• Type: any

An optional reason specified when the AbortSignal was triggered.

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M abortSignal.throwIfAborted()

Ajouté en: v17.3.0, v16.17.0

If abortSignal.aborted is true, throws abortSignal.reason.

C Blob

Ajouté en: v18.0.0

See Blob.

C Buffer

Ajouté en: v0.1.103

• Function

Used to handle binary data. See the buffer section.

C ByteLengthQueuingStrategy

Ajouté en: v18.0.0

A browser-compatible implementation of ByteLengthQueuingStrategy.

M __dirname

This variable may appear to be global but is not. See __dirname.

M __filename

This variable may appear to be global but is not. See __filename.

M atob(data)

Ajouté en: v16.0.0

Global alias for buffer.atob().

M BroadcastChannel

Ajouté en: v18.0.0

See BroadcastChannel.

M btoa(data)

Ajouté en: v16.0.0

Global alias for buffer.btoa().

M clearImmediate(immediateObject)

Ajouté en: v0.9.1

clearImmediate is described in the timers section.

M clearInterval(intervalObject)

Ajouté en: v0.0.1

clearInterval is described in the timers section.

M clearTimeout(timeoutObject)

Ajouté en: v0.0.1

clearTimeout is described in the timers section.

C CompressionStream

Ajouté en: v18.0.0

A browser-compatible implementation of CompressionStream.

M console

Ajouté en: v0.1.100

• Object

Used to print to stdout and stderr. See the console section.

C CountQueuingStrategy

Ajouté en: v18.0.0

A browser-compatible implementation of CountQueuingStrategy.

M Crypto

A browser-compatible implementation of Crypto. This global is available only if the Node.js binary was compiled with including support for the node:crypto module.

M crypto

A browser-compatible implementation of the Web Crypto API.

M CryptoKey

A browser-compatible implementation of CryptoKey. This global is available only if the Node.js binary was compiled with including support for the node:crypto module.

M CustomEvent

A browser-compatible implementation of the CustomEvent Web API.

C DecompressionStream

Ajouté en: v18.0.0

A browser-compatible implementation of DecompressionStream.

M Event

A browser-compatible implementation of the Event class. See EventTarget and Event API for more details.

M EventTarget

A browser-compatible implementation of the EventTarget class. See EventTarget and Event API for more details.

M exports

This variable may appear to be global but is not. See exports.

M fetch

A browser-compatible implementation of the fetch() function.

Class FormData

A browser-compatible implementation of FormData.

M global

Ajouté en: v0.1.27

• Object The global namespace object.

In browsers, the top-level scope is the global scope. This means that within the browser var something will define a new global variable. In Node.js this is different. The top-level scope is not the global scope; var something inside a Node.js module will be local to that module.

Class Headers

A browser-compatible implementation of Headers.

M MessageChannel

Ajouté en: v15.0.0

The MessageChannel class. See MessageChannel for more details.

M MessageEvent

Ajouté en: v15.0.0

The MessageEvent class. See MessageEvent for more details.

M MessagePort

Ajouté en: v15.0.0

The MessagePort class. See MessagePort for more details.

M module

This variable may appear to be global but is not. See module.

M PerformanceEntry

Ajouté en: v19.0.0

The PerformanceEntry class. See PerformanceEntry for more details.

M PerformanceMark

Ajouté en: v19.0.0

The PerformanceMark class. See PerformanceMark for more details.

M PerformanceMeasure

Ajouté en: v19.0.0

The PerformanceMeasure class. See PerformanceMeasure for more details.

M PerformanceObserver

Ajouté en: v19.0.0

The PerformanceObserver class. See PerformanceObserver for more details.

M PerformanceObserverEntryList

Ajouté en: v19.0.0

The PerformanceObserverEntryList class. See PerformanceObserverEntryList for more details.

M PerformanceResourceTiming

Ajouté en: v19.0.0

The PerformanceResourceTiming class. See PerformanceResourceTiming for more details.

M performance

Ajouté en: v16.0.0

The perf_hooks.performance object.

M process

Ajouté en: v0.1.7

• Object

The process object. See the process object section.

M queueMicrotask(callback)

Ajouté en: v11.0.0

• callback Function Function to be queued.

The queueMicrotask() method queues a microtask to invoke callback. If callback throws an exception, the process object 'uncaughtException' event will be emitted.

The microtask queue is managed by V8 and may be used in a similar manner to the process.nextTick() queue, which is managed by Node.js. The process.nextTick() queue is always processed before the microtask queue within each turn of the Node.js event loop.

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C ReadableByteStreamController

Ajouté en: v18.0.0

A browser-compatible implementation of ReadableByteStreamController.

C ReadableStream

Ajouté en: v18.0.0

A browser-compatible implementation of ReadableStream.

C ReadableStreamBYOBReader

Ajouté en: v18.0.0

A browser-compatible implementation of ReadableStreamBYOBReader.

C ReadableStreamBYOBRequest

Ajouté en: v18.0.0

A browser-compatible implementation of ReadableStreamBYOBRequest.

C ReadableStreamDefaultController

Ajouté en: v18.0.0

A browser-compatible implementation of ReadableStreamDefaultController.

C ReadableStreamDefaultReader

Ajouté en: v18.0.0

A browser-compatible implementation of ReadableStreamDefaultReader.

M require()

This variable may appear to be global but is not. See require().

M Response

A browser-compatible implementation of Response.

M Request

A browser-compatible implementation of Request.

M setImmediate(callback[, ...args])

Ajouté en: v0.9.1

setImmediate is described in the timers section.

M setInterval(callback, delay[, ...args])

Ajouté en: v0.0.1

setInterval is described in the timers section.

M setTimeout(callback, delay[, ...args])

Ajouté en: v0.0.1

setTimeout is described in the timers section.

M structuredClone(value[, options])

Ajouté en: v17.0.0

The WHATWG structuredClone method.

M SubtleCrypto

A browser-compatible implementation of SubtleCrypto. This global is available only if the Node.js binary was compiled with including support for the node:crypto module.

M DOMException

Ajouté en: v17.0.0

The WHATWG DOMException class. See DOMException for more details.

M TextDecoder

Ajouté en: v11.0.0

The WHATWG TextDecoder class. See the TextDecoder section.

C TextDecoderStream

Ajouté en: v18.0.0

A browser-compatible implementation of TextDecoderStream.

M TextEncoder

Ajouté en: v11.0.0

The WHATWG TextEncoder class. See the TextEncoder section.

C TextEncoderStream

Ajouté en: v18.0.0

A browser-compatible implementation of TextEncoderStream.

C TransformStream

Ajouté en: v18.0.0

A browser-compatible implementation of TransformStream.

C TransformStreamDefaultController

Ajouté en: v18.0.0

A browser-compatible implementation of TransformStreamDefaultController.

M URL

Ajouté en: v10.0.0

The WHATWG URL class. See the URL section.

M URLSearchParams

Ajouté en: v10.0.0

The WHATWG URLSearchParams class. See the URLSearchParams section.

M WebAssembly

Ajouté en: v8.0.0

• Object

The object that acts as the namespace for all W3C WebAssembly related functionality. See the Mozilla Developer Network for usage and compatibility.

C WritableStream

Ajouté en: v18.0.0

A browser-compatible implementation of WritableStream.

C WritableStreamDefaultController

Ajouté en: v18.0.0

A browser-compatible implementation of WritableStreamDefaultController.

C WritableStreamDefaultWriter

Ajouté en: v18.0.0

A browser-compatible implementation of WritableStreamDefaultWriter.