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Commit b40f0c3

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anonrigMesteeryVoltrexKeyva
authored
lib: add navigator.hardwareConcurrency
Co-authored-by: Mestery <mestery@protonmail.com> Co-authored-by: Voltrex <mohammadkeyvanzade94@gmail.com> PR-URL: #47769 Reviewed-By: Robert Nagy <ronagy@icloud.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
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‎.eslintrc.js‎

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@@ -328,6 +328,7 @@ module.exports = {
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DecompressionStream: 'readable',
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fetch: 'readable',
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FormData: 'readable',
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navigator: 'readable',
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ReadableStream: 'readable',
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ReadableStreamDefaultReader: 'readable',
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ReadableStreamBYOBReader: 'readable',
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‎doc/api/globals.md‎

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@@ -583,6 +583,41 @@ The `MessagePort` class. See [`MessagePort`][] for more details.
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This variable may appear to be global but is not. See [`module`][].
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## `Navigator`
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<!-- YAML
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added: REPLACEME
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-->
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> Stability: 1 - Experimental
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An implementation of the [Navigator API][].
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## `navigator`
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<!-- YAML
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added: REPLACEME
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-->
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> Stability: 1 - Experimental
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An implementation of [`window.navigator`][].
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### `navigator.hardwareConcurrency`
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<!-- YAML
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added: REPLACEME
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-->
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* {number}
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The `navigator.hardwareConcurrency` read-only property returns the number of
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logical processors available to the current Node.js instance.
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```js
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console.log(`This process is running on ${navigator.hardwareConcurrency}`);
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```
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## `PerformanceEntry`
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<!-- YAML
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[CommonJS module]: modules.md
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[ECMAScript module]: esm.md
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[Navigator API]: https://html.spec.whatwg.org/multipage/system-state.html#the-navigator-object
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[Web Crypto API]: webcrypto.md
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[`--no-experimental-fetch`]: cli.md#--no-experimental-fetch
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[`--no-experimental-global-customevent`]: cli.md#--no-experimental-global-customevent
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[`setInterval`]: timers.md#setintervalcallback-delay-args
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[`setTimeout`]: timers.md#settimeoutcallback-delay-args
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[`structuredClone`]: https://developer.mozilla.org/en-US/docs/Web/API/structuredClone
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[`window.navigator`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/navigator
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[buffer section]: buffer.md
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[built-in objects]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects
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[module system documentation]: modules.md
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‎lib/.eslintrc.yaml‎

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@@ -75,6 +75,10 @@ rules:
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message: Use `const { MessageEvent } = require('internal/worker/io');` instead of the global.
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- name: MessagePort
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message: Use `const { MessagePort } = require('internal/worker/io');` instead of the global.
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- name: Navigator
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message: Use `const { Navigator } = require('internal/navigator');` instead of the global.
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- name: navigator
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message: Use `const { navigator } = require('internal/navigator');` instead of the global.
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- name: PerformanceEntry
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message: Use `const { PerformanceEntry } = require('perf_hooks');` instead of the global.
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- name: PerformanceMark
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‎lib/internal/bootstrap/web/exposed-window-or-worker.js‎

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/**
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* This file exposes web interfaces that is defined with the WebIDL
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* Exposed=(Window,Worker) extended attribute or exposed in
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* Exposed=Window + Exposed=(Window,Worker) extended attribute or exposed in
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* WindowOrWorkerGlobalScope mixin.
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* See more details at https://webidl.spec.whatwg.org/#Exposed and
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* https://html.spec.whatwg.org/multipage/webappapis.html#windoworworkerglobalscope.
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defineReplaceableLazyAttribute(globalThis, 'perf_hooks', ['performance']);
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// https://html.spec.whatwg.org/multipage/system-state.html#the-navigator-object
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exposeLazyInterfaces(globalThis, 'internal/navigator', ['Navigator']);
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defineReplaceableLazyAttribute(globalThis, 'internal/navigator', ['navigator'], false);
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// https://w3c.github.io/FileAPI/#creating-revoking
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const { installObjectURLMethods } = require('internal/url');
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installObjectURLMethods();
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‎lib/internal/navigator.js‎

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'use strict';
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const {
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ObjectDefineProperties,
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Symbol,
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} = primordials;
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const {
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ERR_ILLEGAL_CONSTRUCTOR,
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} = require('internal/errors').codes;
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const {
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kEnumerableProperty,
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} = require('internal/util');
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const {
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getAvailableParallelism,
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} = internalBinding('os');
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const kInitialize = Symbol('kInitialize');
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class Navigator {
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// Private properties are used to avoid brand validations.
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#availableParallelism;
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constructor() {
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if (arguments[0] === kInitialize) {
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return;
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}
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throw ERR_ILLEGAL_CONSTRUCTOR();
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}
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/**
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* @return {number}
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*/
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get hardwareConcurrency() {
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this.#availableParallelism ??= getAvailableParallelism();
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return this.#availableParallelism;
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}
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}
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ObjectDefineProperties(Navigator.prototype, {
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hardwareConcurrency: kEnumerableProperty,
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});
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module.exports = {
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navigator: new Navigator(kInitialize),
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Navigator,
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};
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‎test/common/index.js‎

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@@ -309,6 +309,14 @@ if (global.gc) {
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knownGlobals.push(global.gc);
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}
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if (global.navigator) {
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knownGlobals.push(global.navigator);
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}
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if (global.Navigator) {
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knownGlobals.push(global.Navigator);
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}
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if (global.Performance) {
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knownGlobals.push(global.Performance);
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}
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‎test/parallel/test-global.js‎

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@@ -58,6 +58,7 @@ builtinModules.forEach((moduleName) => {
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'structuredClone',
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'fetch',
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'crypto',
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'navigator',
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];
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assert.deepStrictEqual(new Set(Object.keys(global)), new Set(expected));
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}
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‎test/parallel/test-navigator.js‎

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'use strict';
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require('../common');
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const assert = require('assert');
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const is = {
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number: (value, key) => {
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assert(!Number.isNaN(value), `${key} should not be NaN`);
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assert.strictEqual(typeof value, 'number');
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},
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};
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is.number(+navigator.hardwareConcurrency, 'hardwareConcurrency');
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is.number(navigator.hardwareConcurrency, 'hardwareConcurrency');
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assert.ok(navigator.hardwareConcurrency > 0);

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