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class="picker-header"> 117 <a href="#"> 118 <span class="collapsed-arrow">►</span><span class="expanded-arrow">▼</span> 119 Table of contents 120 </a> 121 122 <div class="picker"><div class="toc"><ul> 123<li><a href="#global-objects">Global objects</a> 124<ul> 125<li><a href="#class-abortcontroller">Class: <code>AbortController</code></a> 126<ul> 127<li><a href="#abortcontrollerabortreason"><code>abortController.abort([reason])</code></a></li> 128<li><a href="#abortcontrollersignal"><code>abortController.signal</code></a></li> 129<li><a href="#class-abortsignal">Class: <code>AbortSignal</code></a> 130<ul> 131<li><a href="#static-method-abortsignalabortreason">Static method: <code>AbortSignal.abort([reason])</code></a></li> 132<li><a href="#static-method-abortsignaltimeoutdelay">Static method: <code>AbortSignal.timeout(delay)</code></a></li> 133<li><a href="#static-method-abortsignalanysignals">Static method: <code>AbortSignal.any(signals)</code></a></li> 134<li><a href="#event-abort">Event: <code>'abort'</code></a></li> 135<li><a href="#abortsignalaborted"><code>abortSignal.aborted</code></a></li> 136<li><a href="#abortsignalonabort"><code>abortSignal.onabort</code></a></li> 137<li><a href="#abortsignalreason"><code>abortSignal.reason</code></a></li> 138<li><a href="#abortsignalthrowifaborted"><code>abortSignal.throwIfAborted()</code></a></li> 139</ul> 140</li> 141</ul> 142</li> 143<li><a href="#class-blob">Class: <code>Blob</code></a></li> 144<li><a href="#class-buffer">Class: <code>Buffer</code></a></li> 145<li><span class="stability_1"><a href="#class-bytelengthqueuingstrategy">Class: <code>ByteLengthQueuingStrategy</code></a></span></li> 146<li><a href="#__dirname"><code>__dirname</code></a></li> 147<li><a href="#__filename"><code>__filename</code></a></li> 148<li><span class="stability_3"><a href="#atobdata"><code>atob(data)</code></a></span></li> 149<li><a href="#broadcastchannel"><code>BroadcastChannel</code></a></li> 150<li><span class="stability_3"><a href="#btoadata"><code>btoa(data)</code></a></span></li> 151<li><a href="#clearimmediateimmediateobject"><code>clearImmediate(immediateObject)</code></a></li> 152<li><a href="#clearintervalintervalobject"><code>clearInterval(intervalObject)</code></a></li> 153<li><a href="#cleartimeouttimeoutobject"><code>clearTimeout(timeoutObject)</code></a></li> 154<li><span class="stability_1"><a href="#class-compressionstream">Class: <code>CompressionStream</code></a></span></li> 155<li><a href="#console"><code>console</code></a></li> 156<li><span class="stability_1"><a href="#class-countqueuingstrategy">Class: <code>CountQueuingStrategy</code></a></span></li> 157<li><span class="stability_1"><a href="#crypto"><code>Crypto</code></a></span></li> 158<li><span class="stability_1"><a href="#crypto_1"><code>crypto</code></a></span></li> 159<li><span class="stability_1"><a href="#cryptokey"><code>CryptoKey</code></a></span></li> 160<li><span class="stability_1"><a href="#customevent"><code>CustomEvent</code></a></span></li> 161<li><span class="stability_1"><a href="#class-decompressionstream">Class: <code>DecompressionStream</code></a></span></li> 162<li><a href="#event"><code>Event</code></a></li> 163<li><a href="#eventtarget"><code>EventTarget</code></a></li> 164<li><a href="#exports"><code>exports</code></a></li> 165<li><span class="stability_1"><a href="#fetch"><code>fetch</code></a></span></li> 166<li><span class="stability_1"><a href="#class-formdata">Class <code>FormData</code></a></span></li> 167<li><span class="stability_3"><a href="#global"><code>global</code></a></span></li> 168<li><span class="stability_1"><a href="#class-headers">Class <code>Headers</code></a></span></li> 169<li><a href="#messagechannel"><code>MessageChannel</code></a></li> 170<li><a href="#messageevent"><code>MessageEvent</code></a></li> 171<li><a href="#messageport"><code>MessagePort</code></a></li> 172<li><a href="#module"><code>module</code></a></li> 173<li><a href="#performance"><code>performance</code></a></li> 174<li><a href="#process"><code>process</code></a></li> 175<li><a href="#queuemicrotaskcallback"><code>queueMicrotask(callback)</code></a></li> 176<li><span class="stability_1"><a href="#class-readablebytestreamcontroller">Class: <code>ReadableByteStreamController</code></a></span></li> 177<li><span class="stability_1"><a href="#class-readablestream">Class: <code>ReadableStream</code></a></span></li> 178<li><span class="stability_1"><a href="#class-readablestreambyobreader">Class: <code>ReadableStreamBYOBReader</code></a></span></li> 179<li><span class="stability_1"><a href="#class-readablestreambyobrequest">Class: <code>ReadableStreamBYOBRequest</code></a></span></li> 180<li><span class="stability_1"><a href="#class-readablestreamdefaultcontroller">Class: <code>ReadableStreamDefaultController</code></a></span></li> 181<li><span class="stability_1"><a href="#class-readablestreamdefaultreader">Class: <code>ReadableStreamDefaultReader</code></a></span></li> 182<li><a href="#require"><code>require()</code></a></li> 183<li><span class="stability_1"><a href="#response"><code>Response</code></a></span></li> 184<li><span class="stability_1"><a href="#request"><code>Request</code></a></span></li> 185<li><a href="#setimmediatecallback-args"><code>setImmediate(callback[, ...args])</code></a></li> 186<li><a href="#setintervalcallback-delay-args"><code>setInterval(callback, delay[, ...args])</code></a></li> 187<li><a href="#settimeoutcallback-delay-args"><code>setTimeout(callback, delay[, ...args])</code></a></li> 188<li><a href="#structuredclonevalue-options"><code>structuredClone(value[, options])</code></a></li> 189<li><span class="stability_1"><a href="#subtlecrypto"><code>SubtleCrypto</code></a></span></li> 190<li><a href="#domexception"><code>DOMException</code></a></li> 191<li><a href="#textdecoder"><code>TextDecoder</code></a></li> 192<li><span class="stability_1"><a href="#class-textdecoderstream">Class: <code>TextDecoderStream</code></a></span></li> 193<li><a href="#textencoder"><code>TextEncoder</code></a></li> 194<li><span class="stability_1"><a href="#class-textencoderstream">Class: <code>TextEncoderStream</code></a></span></li> 195<li><span class="stability_1"><a href="#class-transformstream">Class: <code>TransformStream</code></a></span></li> 196<li><span class="stability_1"><a href="#class-transformstreamdefaultcontroller">Class: <code>TransformStreamDefaultController</code></a></span></li> 197<li><a href="#url"><code>URL</code></a></li> 198<li><a href="#urlsearchparams"><code>URLSearchParams</code></a></li> 199<li><a href="#webassembly"><code>WebAssembly</code></a></li> 200<li><span class="stability_1"><a href="#class-writablestream">Class: <code>WritableStream</code></a></span></li> 201<li><span class="stability_1"><a href="#class-writablestreamdefaultcontroller">Class: <code>WritableStreamDefaultController</code></a></span></li> 202<li><span class="stability_1"><a href="#class-writablestreamdefaultwriter">Class: <code>WritableStreamDefaultWriter</code></a></span></li> 203</ul> 204</li> 205</ul></div></div> 206 </li> 207 208 209 <li class="picker-header"> 210 <a href="#"> 211 <span class="collapsed-arrow">►</span><span class="expanded-arrow">▼</span> 212 Index 213 </a> 214 215 <div class="picker"><ul> 216<li><a href="documentation.html" class="nav-documentation">About this documentation</a></li> 217<li><a href="synopsis.html" class="nav-synopsis">Usage and example</a></li> 218 219 <li> 220 <a href="index.html">Index</a> 221 </li> 222 </ul> 223 224<hr class="line"> 225<ul> 226<li><a href="assert.html" class="nav-assert">Assertion testing</a></li> 227<li><a href="async_context.html" class="nav-async_context">Asynchronous context tracking</a></li> 228<li><a href="async_hooks.html" class="nav-async_hooks">Async hooks</a></li> 229<li><a href="buffer.html" class="nav-buffer">Buffer</a></li> 230<li><a 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288<ul> 289<li><a href="https://github.com/nodejs/node" class="nav-https-github-com-nodejs-node">Code repository and issue tracker</a></li> 290</ul></div> 291 </li> 292 293 294 <li class="picker-header"> 295 <a href="#"> 296 <span class="collapsed-arrow">►</span><span class="expanded-arrow">▼</span> 297 Other versions 298 </a> 299 <div class="picker"><ol id="alt-docs"><li><a href="https://nodejs.org/docs/latest-v20.x/api/globals.html">20.x</a></li> 300<li><a href="https://nodejs.org/docs/latest-v19.x/api/globals.html">19.x</a></li> 301<li><a href="https://nodejs.org/docs/latest-v18.x/api/globals.html">18.x <b>LTS</b></a></li> 302<li><a href="https://nodejs.org/docs/latest-v17.x/api/globals.html">17.x</a></li> 303<li><a href="https://nodejs.org/docs/latest-v16.x/api/globals.html">16.x</a></li> 304<li><a href="https://nodejs.org/docs/latest-v15.x/api/globals.html">15.x</a></li> 305<li><a href="https://nodejs.org/docs/latest-v14.x/api/globals.html">14.x</a></li> 306<li><a href="https://nodejs.org/docs/latest-v13.x/api/globals.html">13.x</a></li> 307<li><a href="https://nodejs.org/docs/latest-v12.x/api/globals.html">12.x</a></li> 308<li><a href="https://nodejs.org/docs/latest-v11.x/api/globals.html">11.x</a></li> 309<li><a href="https://nodejs.org/docs/latest-v10.x/api/globals.html">10.x</a></li> 310<li><a href="https://nodejs.org/docs/latest-v9.x/api/globals.html">9.x</a></li> 311<li><a href="https://nodejs.org/docs/latest-v8.x/api/globals.html">8.x</a></li> 312<li><a href="https://nodejs.org/docs/latest-v7.x/api/globals.html">7.x</a></li> 313<li><a href="https://nodejs.org/docs/latest-v6.x/api/globals.html">6.x</a></li> 314<li><a href="https://nodejs.org/docs/latest-v5.x/api/globals.html">5.x</a></li> 315<li><a href="https://nodejs.org/docs/latest-v4.x/api/globals.html">4.x</a></li> 316<li><a href="https://nodejs.org/docs/latest-v0.12.x/api/globals.html">0.12.x</a></li> 317<li><a href="https://nodejs.org/docs/latest-v0.10.x/api/globals.html">0.10.x</a></li></ol></div> 318 </li> 319 320 <li class="picker-header"> 321 <a href="#"> 322 <span class="collapsed-arrow">►</span><span class="expanded-arrow">▼</span> 323 Options 324 </a> 325 326 <div class="picker"> 327 <ul> 328 <li> 329 <a href="all.html">View on single page</a> 330 </li> 331 <li> 332 <a href="globals.json">View as JSON</a> 333 </li> 334 <li class="edit_on_github"><a href="https://github.com/nodejs/node/edit/main/doc/api/globals.md">Edit on GitHub</a></li> 335 </ul> 336 </div> 337 </li> 338 </ul> 339 </div> 340 <hr> 341 </header> 342 343 <details id="toc" open><summary>Table of contents</summary><ul> 344<li><a href="#global-objects">Global objects</a> 345<ul> 346<li><a href="#class-abortcontroller">Class: <code>AbortController</code></a> 347<ul> 348<li><a href="#abortcontrollerabortreason"><code>abortController.abort([reason])</code></a></li> 349<li><a href="#abortcontrollersignal"><code>abortController.signal</code></a></li> 350<li><a href="#class-abortsignal">Class: <code>AbortSignal</code></a> 351<ul> 352<li><a href="#static-method-abortsignalabortreason">Static method: <code>AbortSignal.abort([reason])</code></a></li> 353<li><a href="#static-method-abortsignaltimeoutdelay">Static method: <code>AbortSignal.timeout(delay)</code></a></li> 354<li><a href="#static-method-abortsignalanysignals">Static method: <code>AbortSignal.any(signals)</code></a></li> 355<li><a href="#event-abort">Event: <code>'abort'</code></a></li> 356<li><a href="#abortsignalaborted"><code>abortSignal.aborted</code></a></li> 357<li><a href="#abortsignalonabort"><code>abortSignal.onabort</code></a></li> 358<li><a href="#abortsignalreason"><code>abortSignal.reason</code></a></li> 359<li><a href="#abortsignalthrowifaborted"><code>abortSignal.throwIfAborted()</code></a></li> 360</ul> 361</li> 362</ul> 363</li> 364<li><a href="#class-blob">Class: <code>Blob</code></a></li> 365<li><a href="#class-buffer">Class: <code>Buffer</code></a></li> 366<li><span class="stability_1"><a href="#class-bytelengthqueuingstrategy">Class: <code>ByteLengthQueuingStrategy</code></a></span></li> 367<li><a href="#__dirname"><code>__dirname</code></a></li> 368<li><a href="#__filename"><code>__filename</code></a></li> 369<li><span class="stability_3"><a href="#atobdata"><code>atob(data)</code></a></span></li> 370<li><a href="#broadcastchannel"><code>BroadcastChannel</code></a></li> 371<li><span class="stability_3"><a href="#btoadata"><code>btoa(data)</code></a></span></li> 372<li><a href="#clearimmediateimmediateobject"><code>clearImmediate(immediateObject)</code></a></li> 373<li><a href="#clearintervalintervalobject"><code>clearInterval(intervalObject)</code></a></li> 374<li><a href="#cleartimeouttimeoutobject"><code>clearTimeout(timeoutObject)</code></a></li> 375<li><span class="stability_1"><a href="#class-compressionstream">Class: <code>CompressionStream</code></a></span></li> 376<li><a href="#console"><code>console</code></a></li> 377<li><span class="stability_1"><a href="#class-countqueuingstrategy">Class: <code>CountQueuingStrategy</code></a></span></li> 378<li><span class="stability_1"><a href="#crypto"><code>Crypto</code></a></span></li> 379<li><span class="stability_1"><a href="#crypto_1"><code>crypto</code></a></span></li> 380<li><span class="stability_1"><a href="#cryptokey"><code>CryptoKey</code></a></span></li> 381<li><span class="stability_1"><a href="#customevent"><code>CustomEvent</code></a></span></li> 382<li><span class="stability_1"><a href="#class-decompressionstream">Class: <code>DecompressionStream</code></a></span></li> 383<li><a href="#event"><code>Event</code></a></li> 384<li><a href="#eventtarget"><code>EventTarget</code></a></li> 385<li><a href="#exports"><code>exports</code></a></li> 386<li><span class="stability_1"><a href="#fetch"><code>fetch</code></a></span></li> 387<li><span class="stability_1"><a href="#class-formdata">Class <code>FormData</code></a></span></li> 388<li><span class="stability_3"><a href="#global"><code>global</code></a></span></li> 389<li><span class="stability_1"><a href="#class-headers">Class <code>Headers</code></a></span></li> 390<li><a href="#messagechannel"><code>MessageChannel</code></a></li> 391<li><a href="#messageevent"><code>MessageEvent</code></a></li> 392<li><a href="#messageport"><code>MessagePort</code></a></li> 393<li><a href="#module"><code>module</code></a></li> 394<li><a href="#performance"><code>performance</code></a></li> 395<li><a href="#process"><code>process</code></a></li> 396<li><a href="#queuemicrotaskcallback"><code>queueMicrotask(callback)</code></a></li> 397<li><span class="stability_1"><a href="#class-readablebytestreamcontroller">Class: <code>ReadableByteStreamController</code></a></span></li> 398<li><span class="stability_1"><a href="#class-readablestream">Class: <code>ReadableStream</code></a></span></li> 399<li><span class="stability_1"><a href="#class-readablestreambyobreader">Class: <code>ReadableStreamBYOBReader</code></a></span></li> 400<li><span class="stability_1"><a href="#class-readablestreambyobrequest">Class: <code>ReadableStreamBYOBRequest</code></a></span></li> 401<li><span class="stability_1"><a href="#class-readablestreamdefaultcontroller">Class: <code>ReadableStreamDefaultController</code></a></span></li> 402<li><span class="stability_1"><a href="#class-readablestreamdefaultreader">Class: <code>ReadableStreamDefaultReader</code></a></span></li> 403<li><a href="#require"><code>require()</code></a></li> 404<li><span class="stability_1"><a href="#response"><code>Response</code></a></span></li> 405<li><span class="stability_1"><a href="#request"><code>Request</code></a></span></li> 406<li><a href="#setimmediatecallback-args"><code>setImmediate(callback[, ...args])</code></a></li> 407<li><a href="#setintervalcallback-delay-args"><code>setInterval(callback, delay[, ...args])</code></a></li> 408<li><a href="#settimeoutcallback-delay-args"><code>setTimeout(callback, delay[, ...args])</code></a></li> 409<li><a href="#structuredclonevalue-options"><code>structuredClone(value[, options])</code></a></li> 410<li><span class="stability_1"><a href="#subtlecrypto"><code>SubtleCrypto</code></a></span></li> 411<li><a href="#domexception"><code>DOMException</code></a></li> 412<li><a href="#textdecoder"><code>TextDecoder</code></a></li> 413<li><span class="stability_1"><a href="#class-textdecoderstream">Class: <code>TextDecoderStream</code></a></span></li> 414<li><a href="#textencoder"><code>TextEncoder</code></a></li> 415<li><span class="stability_1"><a href="#class-textencoderstream">Class: <code>TextEncoderStream</code></a></span></li> 416<li><span class="stability_1"><a href="#class-transformstream">Class: <code>TransformStream</code></a></span></li> 417<li><span class="stability_1"><a href="#class-transformstreamdefaultcontroller">Class: <code>TransformStreamDefaultController</code></a></span></li> 418<li><a href="#url"><code>URL</code></a></li> 419<li><a href="#urlsearchparams"><code>URLSearchParams</code></a></li> 420<li><a href="#webassembly"><code>WebAssembly</code></a></li> 421<li><span class="stability_1"><a href="#class-writablestream">Class: <code>WritableStream</code></a></span></li> 422<li><span class="stability_1"><a href="#class-writablestreamdefaultcontroller">Class: <code>WritableStreamDefaultController</code></a></span></li> 423<li><span class="stability_1"><a href="#class-writablestreamdefaultwriter">Class: <code>WritableStreamDefaultWriter</code></a></span></li> 424</ul> 425</li> 426</ul></details> 427 428 <div id="apicontent"> 429 <h2>Global objects<span><a class="mark" href="#global-objects" id="global-objects">#</a></span><a aria-hidden="true" class="legacy" id="globals_global_objects"></a></h2> 430 431 432<p>These objects are available in all modules. The following variables may appear 433to be global but are not. They exist only in the scope of modules, see the 434<a href="modules.html">module system documentation</a>:</p> 435<ul> 436<li><a href="modules.html#__dirname"><code>__dirname</code></a></li> 437<li><a href="modules.html#__filename"><code>__filename</code></a></li> 438<li><a href="modules.html#exports"><code>exports</code></a></li> 439<li><a href="modules.html#module"><code>module</code></a></li> 440<li><a href="modules.html#requireid"><code>require()</code></a></li> 441</ul> 442<p>The objects listed here are specific to Node.js. There are <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects">built-in objects</a> 443that are part of the JavaScript language itself, which are also globally 444accessible.</p> 445<section><h3>Class: <code>AbortController</code><span><a class="mark" href="#class-abortcontroller" id="class-abortcontroller">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_abortcontroller"></a></h3> 446<div class="api_metadata"> 447<details class="changelog"><summary>History</summary> 448<table> 449<tbody><tr><th>Version</th><th>Changes</th></tr> 450<tr><td>v15.4.0</td> 451<td><p>No longer experimental.</p></td></tr> 452<tr><td>v15.0.0, v14.17.0</td> 453<td><p><span>Added in: v15.0.0, v14.17.0</span></p></td></tr> 454</tbody></table> 455</details> 456</div> 457 458<p>A utility class used to signal cancelation in selected <code>Promise</code>-based APIs. 459The API is based on the Web API <a href="https://developer.mozilla.org/en-US/docs/Web/API/AbortController"><code>AbortController</code></a>.</p> 460<pre><code class="language-js"><span class="hljs-keyword">const</span> ac = <span class="hljs-keyword">new</span> <span class="hljs-title class_">AbortController</span>(); 461 462ac.<span class="hljs-property">signal</span>.<span class="hljs-title function_">addEventListener</span>(<span class="hljs-string">'abort'</span>, <span class="hljs-function">() =></span> <span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(<span class="hljs-string">'Aborted!'</span>), 463 { <span class="hljs-attr">once</span>: <span class="hljs-literal">true</span> }); 464 465ac.<span class="hljs-title function_">abort</span>(); 466 467<span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(ac.<span class="hljs-property">signal</span>.<span class="hljs-property">aborted</span>); <span class="hljs-comment">// Prints true</span></code> <button class="copy-button">copy</button></pre> 468<h4><code>abortController.abort([reason])</code><span><a class="mark" href="#abortcontrollerabortreason" id="abortcontrollerabortreason">#</a></span><a aria-hidden="true" class="legacy" id="globals_abortcontroller_abort_reason"></a></h4> 469<div class="api_metadata"> 470<details class="changelog"><summary>History</summary> 471<table> 472<tbody><tr><th>Version</th><th>Changes</th></tr> 473<tr><td>v17.2.0, v16.14.0</td> 474<td><p>Added the new optional reason argument.</p></td></tr> 475<tr><td>v15.0.0, v14.17.0</td> 476<td><p><span>Added in: v15.0.0, v14.17.0</span></p></td></tr> 477</tbody></table> 478</details> 479</div> 480<ul> 481<li><code>reason</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type"><any></a> An optional reason, retrievable on the <code>AbortSignal</code>'s 482<code>reason</code> property.</li> 483</ul> 484<p>Triggers the abort signal, causing the <code>abortController.signal</code> to emit 485the <code>'abort'</code> event.</p> 486<h4><code>abortController.signal</code><span><a class="mark" href="#abortcontrollersignal" id="abortcontrollersignal">#</a></span><a aria-hidden="true" class="legacy" id="globals_abortcontroller_signal"></a></h4> 487<div class="api_metadata"> 488<span>Added in: v15.0.0, v14.17.0</span> 489</div> 490<ul> 491<li>Type: <a href="globals.html#class-abortsignal" class="type"><AbortSignal></a></li> 492</ul> 493<h4>Class: <code>AbortSignal</code><span><a class="mark" href="#class-abortsignal" id="class-abortsignal">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_abortsignal"></a></h4> 494<div class="api_metadata"> 495<span>Added in: v15.0.0, v14.17.0</span> 496</div> 497<ul> 498<li>Extends: <a href="events.html#class-eventtarget" class="type"><EventTarget></a></li> 499</ul> 500<p>The <code>AbortSignal</code> is used to notify observers when the 501<code>abortController.abort()</code> method is called.</p> 502<h5>Static method: <code>AbortSignal.abort([reason])</code><span><a class="mark" href="#static-method-abortsignalabortreason" id="static-method-abortsignalabortreason">#</a></span><a aria-hidden="true" class="legacy" id="globals_static_method_abortsignal_abort_reason"></a></h5> 503<div class="api_metadata"> 504<details class="changelog"><summary>History</summary> 505<table> 506<tbody><tr><th>Version</th><th>Changes</th></tr> 507<tr><td>v17.2.0, v16.14.0</td> 508<td><p>Added the new optional reason argument.</p></td></tr> 509<tr><td>v15.12.0, v14.17.0</td> 510<td><p><span>Added in: v15.12.0, v14.17.0</span></p></td></tr> 511</tbody></table> 512</details> 513</div> 514<ul> 515<li><code>reason</code>: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type"><any></a></li> 516<li>Returns: <a href="globals.html#class-abortsignal" class="type"><AbortSignal></a></li> 517</ul> 518<p>Returns a new already aborted <code>AbortSignal</code>.</p> 519<h5>Static method: <code>AbortSignal.timeout(delay)</code><span><a class="mark" href="#static-method-abortsignaltimeoutdelay" id="static-method-abortsignaltimeoutdelay">#</a></span><a aria-hidden="true" class="legacy" id="globals_static_method_abortsignal_timeout_delay"></a></h5> 520<div class="api_metadata"> 521<span>Added in: v17.3.0, v16.14.0</span> 522</div> 523<ul> 524<li><code>delay</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type"><number></a> The number of milliseconds to wait before triggering 525the AbortSignal.</li> 526</ul> 527<p>Returns a new <code>AbortSignal</code> which will be aborted in <code>delay</code> milliseconds.</p> 528<h5>Static method: <code>AbortSignal.any(signals)</code><span><a class="mark" href="#static-method-abortsignalanysignals" id="static-method-abortsignalanysignals">#</a></span><a aria-hidden="true" class="legacy" id="globals_static_method_abortsignal_any_signals"></a></h5> 529<div class="api_metadata"> 530<span>Added in: v18.17.0</span> 531</div> 532<ul> 533<li><code>signals</code> <a href="globals.html#class-abortsignal" class="type"><AbortSignal[]></a> The <code>AbortSignal</code>s of which to compose a new <code>AbortSignal</code>.</li> 534</ul> 535<p>Returns a new <code>AbortSignal</code> which will be aborted if any of the provided 536signals are aborted. Its <a href="#abortsignalreason"><code>abortSignal.reason</code></a> will be set to whichever 537one of the <code>signals</code> caused it to be aborted.</p> 538<h5>Event: <code>'abort'</code><span><a class="mark" href="#event-abort" id="event-abort">#</a></span><a aria-hidden="true" class="legacy" id="globals_event_abort"></a></h5> 539<div class="api_metadata"> 540<span>Added in: v15.0.0, v14.17.0</span> 541</div> 542<p>The <code>'abort'</code> event is emitted when the <code>abortController.abort()</code> method 543is called. The callback is invoked with a single object argument with a 544single <code>type</code> property set to <code>'abort'</code>:</p> 545<pre><code class="language-js"><span class="hljs-keyword">const</span> ac = <span class="hljs-keyword">new</span> <span class="hljs-title class_">AbortController</span>(); 546 547<span class="hljs-comment">// Use either the onabort property...</span> 548ac.<span class="hljs-property">signal</span>.<span class="hljs-property">onabort</span> = <span class="hljs-function">() =></span> <span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(<span class="hljs-string">'aborted!'</span>); 549 550<span class="hljs-comment">// Or the EventTarget API...</span> 551ac.<span class="hljs-property">signal</span>.<span class="hljs-title function_">addEventListener</span>(<span class="hljs-string">'abort'</span>, <span class="hljs-function">(<span class="hljs-params">event</span>) =></span> { 552 <span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(event.<span class="hljs-property">type</span>); <span class="hljs-comment">// Prints 'abort'</span> 553}, { <span class="hljs-attr">once</span>: <span class="hljs-literal">true</span> }); 554 555ac.<span class="hljs-title function_">abort</span>();</code> <button class="copy-button">copy</button></pre> 556<p>The <code>AbortController</code> with which the <code>AbortSignal</code> is associated will only 557ever trigger the <code>'abort'</code> event once. We recommended that code check 558that the <code>abortSignal.aborted</code> attribute is <code>false</code> before adding an <code>'abort'</code> 559event listener.</p> 560<p>Any event listeners attached to the <code>AbortSignal</code> should use the 561<code>{ once: true }</code> option (or, if using the <code>EventEmitter</code> APIs to attach a 562listener, use the <code>once()</code> method) to ensure that the event listener is 563removed as soon as the <code>'abort'</code> event is handled. Failure to do so may 564result in memory leaks.</p> 565<h5><code>abortSignal.aborted</code><span><a class="mark" href="#abortsignalaborted" id="abortsignalaborted">#</a></span><a aria-hidden="true" class="legacy" id="globals_abortsignal_aborted"></a></h5> 566<div class="api_metadata"> 567<span>Added in: v15.0.0, v14.17.0</span> 568</div> 569<ul> 570<li>Type: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type"><boolean></a> True after the <code>AbortController</code> has been aborted.</li> 571</ul> 572<h5><code>abortSignal.onabort</code><span><a class="mark" href="#abortsignalonabort" id="abortsignalonabort">#</a></span><a aria-hidden="true" class="legacy" id="globals_abortsignal_onabort"></a></h5> 573<div class="api_metadata"> 574<span>Added in: v15.0.0, v14.17.0</span> 575</div> 576<ul> 577<li>Type: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type"><Function></a></li> 578</ul> 579<p>An optional callback function that may be set by user code to be notified 580when the <code>abortController.abort()</code> function has been called.</p> 581<h5><code>abortSignal.reason</code><span><a class="mark" href="#abortsignalreason" id="abortsignalreason">#</a></span><a aria-hidden="true" class="legacy" id="globals_abortsignal_reason"></a></h5> 582<div class="api_metadata"> 583<span>Added in: v17.2.0, v16.14.0</span> 584</div> 585<ul> 586<li>Type: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type"><any></a></li> 587</ul> 588<p>An optional reason specified when the <code>AbortSignal</code> was triggered.</p> 589<pre><code class="language-js"><span class="hljs-keyword">const</span> ac = <span class="hljs-keyword">new</span> <span class="hljs-title class_">AbortController</span>(); 590ac.<span class="hljs-title function_">abort</span>(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Error</span>(<span class="hljs-string">'boom!'</span>)); 591<span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(ac.<span class="hljs-property">signal</span>.<span class="hljs-property">reason</span>); <span class="hljs-comment">// Error: boom!</span></code> <button class="copy-button">copy</button></pre> 592<h5><code>abortSignal.throwIfAborted()</code><span><a class="mark" href="#abortsignalthrowifaborted" id="abortsignalthrowifaborted">#</a></span><a aria-hidden="true" class="legacy" id="globals_abortsignal_throwifaborted"></a></h5> 593<div class="api_metadata"> 594<span>Added in: v17.3.0</span> 595</div> 596<p>If <code>abortSignal.aborted</code> is <code>true</code>, throws <code>abortSignal.reason</code>.</p> 597</section><section><h3>Class: <code>Blob</code><span><a class="mark" href="#class-blob" id="class-blob">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_blob"></a></h3> 598<div class="api_metadata"> 599<span>Added in: v18.0.0</span> 600</div> 601 602<p>See <a href="buffer.html#class-blob" class="type"><Blob></a>.</p> 603</section><section><h3>Class: <code>Buffer</code><span><a class="mark" href="#class-buffer" id="class-buffer">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_buffer"></a></h3> 604<div class="api_metadata"> 605<span>Added in: v0.1.103</span> 606</div> 607 608<ul> 609<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type"><Function></a></li> 610</ul> 611<p>Used to handle binary data. See the <a href="buffer.html">buffer section</a>.</p> 612</section><section><h3>Class: <code>ByteLengthQueuingStrategy</code><span><a class="mark" href="#class-bytelengthqueuingstrategy" id="class-bytelengthqueuingstrategy">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_bytelengthqueuingstrategy"></a></h3> 613<div class="api_metadata"> 614<span>Added in: v18.0.0</span> 615</div> 616<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 617<p>A browser-compatible implementation of <a href="webstreams.html#class-bytelengthqueuingstrategy"><code>ByteLengthQueuingStrategy</code></a>.</p> 618</section><section><h3><code>__dirname</code><span><a class="mark" href="#__dirname" id="__dirname">#</a></span><a aria-hidden="true" class="legacy" id="globals_dirname"></a></h3> 619<p>This variable may appear to be global but is not. See <a href="modules.html#__dirname"><code>__dirname</code></a>.</p> 620</section><section><h3><code>__filename</code><span><a class="mark" href="#__filename" id="__filename">#</a></span><a aria-hidden="true" class="legacy" id="globals_filename"></a></h3> 621<p>This variable may appear to be global but is not. See <a href="modules.html#__filename"><code>__filename</code></a>.</p> 622</section><section><h3><code>atob(data)</code><span><a class="mark" href="#atobdata" id="atobdata">#</a></span><a aria-hidden="true" class="legacy" id="globals_atob_data"></a></h3> 623<div class="api_metadata"> 624<span>Added in: v16.0.0</span> 625</div> 626<p></p><div class="api_stability api_stability_3"><a href="documentation.html#stability-index">Stability: 3</a> - Legacy. Use <code>Buffer.from(data, 'base64')</code> instead.</div><p></p> 627<p>Global alias for <a href="buffer.html#bufferatobdata"><code>buffer.atob()</code></a>.</p> 628</section><section><h3><code>BroadcastChannel</code><span><a class="mark" href="#broadcastchannel" id="broadcastchannel">#</a></span><a aria-hidden="true" class="legacy" id="globals_broadcastchannel"></a></h3> 629<div class="api_metadata"> 630<span>Added in: v18.0.0</span> 631</div> 632<p>See <a href="worker_threads.html#class-broadcastchannel-extends-eventtarget" class="type"><BroadcastChannel></a>.</p> 633</section><section><h3><code>btoa(data)</code><span><a class="mark" href="#btoadata" id="btoadata">#</a></span><a aria-hidden="true" class="legacy" id="globals_btoa_data"></a></h3> 634<div class="api_metadata"> 635<span>Added in: v16.0.0</span> 636</div> 637<p></p><div class="api_stability api_stability_3"><a href="documentation.html#stability-index">Stability: 3</a> - Legacy. Use <code>buf.toString('base64')</code> instead.</div><p></p> 638<p>Global alias for <a href="buffer.html#bufferbtoadata"><code>buffer.btoa()</code></a>.</p> 639</section><section><h3><code>clearImmediate(immediateObject)</code><span><a class="mark" href="#clearimmediateimmediateobject" id="clearimmediateimmediateobject">#</a></span><a aria-hidden="true" class="legacy" id="globals_clearimmediate_immediateobject"></a></h3> 640<div class="api_metadata"> 641<span>Added in: v0.9.1</span> 642</div> 643 644<p><a href="timers.html#clearimmediateimmediate"><code>clearImmediate</code></a> is described in the <a href="timers.html">timers</a> section.</p> 645</section><section><h3><code>clearInterval(intervalObject)</code><span><a class="mark" href="#clearintervalintervalobject" id="clearintervalintervalobject">#</a></span><a aria-hidden="true" class="legacy" id="globals_clearinterval_intervalobject"></a></h3> 646<div class="api_metadata"> 647<span>Added in: v0.0.1</span> 648</div> 649 650<p><a href="timers.html#clearintervaltimeout"><code>clearInterval</code></a> is described in the <a href="timers.html">timers</a> section.</p> 651</section><section><h3><code>clearTimeout(timeoutObject)</code><span><a class="mark" href="#cleartimeouttimeoutobject" id="cleartimeouttimeoutobject">#</a></span><a aria-hidden="true" class="legacy" id="globals_cleartimeout_timeoutobject"></a></h3> 652<div class="api_metadata"> 653<span>Added in: v0.0.1</span> 654</div> 655 656<p><a href="timers.html#cleartimeouttimeout"><code>clearTimeout</code></a> is described in the <a href="timers.html">timers</a> section.</p> 657</section><section><h3>Class: <code>CompressionStream</code><span><a class="mark" href="#class-compressionstream" id="class-compressionstream">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_compressionstream"></a></h3> 658<div class="api_metadata"> 659<span>Added in: v18.0.0</span> 660</div> 661<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 662<p>A browser-compatible implementation of <a href="webstreams.html#class-compressionstream"><code>CompressionStream</code></a>.</p> 663</section><section><h3><code>console</code><span><a class="mark" href="#console" id="console">#</a></span><a aria-hidden="true" class="legacy" id="globals_console"></a></h3> 664<div class="api_metadata"> 665<span>Added in: v0.1.100</span> 666</div> 667 668<ul> 669<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type"><Object></a></li> 670</ul> 671<p>Used to print to stdout and stderr. See the <a href="console.html"><code>console</code></a> section.</p> 672</section><section><h3>Class: <code>CountQueuingStrategy</code><span><a class="mark" href="#class-countqueuingstrategy" id="class-countqueuingstrategy">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_countqueuingstrategy"></a></h3> 673<div class="api_metadata"> 674<span>Added in: v18.0.0</span> 675</div> 676<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 677<p>A browser-compatible implementation of <a href="webstreams.html#class-countqueuingstrategy"><code>CountQueuingStrategy</code></a>.</p> 678</section><section><h3><code>Crypto</code><span><a class="mark" href="#crypto" id="crypto">#</a></span><a aria-hidden="true" class="legacy" id="globals_crypto"></a></h3> 679<div class="api_metadata"> 680<span>Added in: v17.6.0</span> 681</div> 682<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Enable this API with the 683<a href="cli.html#--experimental-global-webcrypto"><code>--experimental-global-webcrypto</code></a> CLI flag.</div><p></p> 684<p>A browser-compatible implementation of <a href="webcrypto.html#class-crypto" class="type"><Crypto></a>. This global is available 685only if the Node.js binary was compiled with including support for the 686<code>node:crypto</code> module.</p> 687</section><section><h3><code>crypto</code><span><a class="mark" href="#crypto_1" id="crypto_1">#</a></span><a aria-hidden="true" class="legacy" id="globals_crypto_1"></a></h3> 688<div class="api_metadata"> 689<span>Added in: v17.6.0</span> 690</div> 691<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Enable this API with the 692<a href="cli.html#--experimental-global-webcrypto"><code>--experimental-global-webcrypto</code></a> CLI flag.</div><p></p> 693<p>A browser-compatible implementation of the <a href="webcrypto.html">Web Crypto API</a>.</p> 694</section><section><h3><code>CryptoKey</code><span><a class="mark" href="#cryptokey" id="cryptokey">#</a></span><a aria-hidden="true" class="legacy" id="globals_cryptokey"></a></h3> 695<div class="api_metadata"> 696<span>Added in: v17.6.0</span> 697</div> 698<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Enable this API with the 699<a href="cli.html#--experimental-global-webcrypto"><code>--experimental-global-webcrypto</code></a> CLI flag.</div><p></p> 700<p>A browser-compatible implementation of <a href="webcrypto.html#class-cryptokey" class="type"><CryptoKey></a>. This global is available 701only if the Node.js binary was compiled with including support for the 702<code>node:crypto</code> module.</p> 703</section><section><h3><code>CustomEvent</code><span><a class="mark" href="#customevent" id="customevent">#</a></span><a aria-hidden="true" class="legacy" id="globals_customevent"></a></h3> 704<div class="api_metadata"> 705<span>Added in: v18.7.0</span> 706</div> 707<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Enable this API with the 708<a href="cli.html#--experimental-global-customevent"><code>--experimental-global-customevent</code></a> CLI flag.</div><p></p> 709 710<p>A browser-compatible implementation of the <a href="https://dom.spec.whatwg.org/#customevent"><code>CustomEvent</code> Web API</a>.</p> 711</section><section><h3>Class: <code>DecompressionStream</code><span><a class="mark" href="#class-decompressionstream" id="class-decompressionstream">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_decompressionstream"></a></h3> 712<div class="api_metadata"> 713<span>Added in: v18.0.0</span> 714</div> 715<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 716<p>A browser-compatible implementation of <a href="webstreams.html#class-decompressionstream"><code>DecompressionStream</code></a>.</p> 717</section><section><h3><code>Event</code><span><a class="mark" href="#event" id="event">#</a></span><a aria-hidden="true" class="legacy" id="globals_event"></a></h3> 718<div class="api_metadata"> 719<details class="changelog"><summary>History</summary> 720<table> 721<tbody><tr><th>Version</th><th>Changes</th></tr> 722<tr><td>v15.4.0</td> 723<td><p>No longer experimental.</p></td></tr> 724<tr><td>v15.0.0</td> 725<td><p><span>Added in: v15.0.0</span></p></td></tr> 726</tbody></table> 727</details> 728</div> 729 730<p>A browser-compatible implementation of the <code>Event</code> class. See 731<a href="events.html#eventtarget-and-event-api"><code>EventTarget</code> and <code>Event</code> API</a> for more details.</p> 732</section><section><h3><code>EventTarget</code><span><a class="mark" href="#eventtarget" id="eventtarget">#</a></span><a aria-hidden="true" class="legacy" id="globals_eventtarget"></a></h3> 733<div class="api_metadata"> 734<details class="changelog"><summary>History</summary> 735<table> 736<tbody><tr><th>Version</th><th>Changes</th></tr> 737<tr><td>v15.4.0</td> 738<td><p>No longer experimental.</p></td></tr> 739<tr><td>v15.0.0</td> 740<td><p><span>Added in: v15.0.0</span></p></td></tr> 741</tbody></table> 742</details> 743</div> 744 745<p>A browser-compatible implementation of the <code>EventTarget</code> class. See 746<a href="events.html#eventtarget-and-event-api"><code>EventTarget</code> and <code>Event</code> API</a> for more details.</p> 747</section><section><h3><code>exports</code><span><a class="mark" href="#exports" id="exports">#</a></span><a aria-hidden="true" class="legacy" id="globals_exports"></a></h3> 748<p>This variable may appear to be global but is not. See <a href="modules.html#exports"><code>exports</code></a>.</p> 749</section><section><h3><code>fetch</code><span><a class="mark" href="#fetch" id="fetch">#</a></span><a aria-hidden="true" class="legacy" id="globals_fetch"></a></h3> 750<div class="api_metadata"> 751<details class="changelog"><summary>History</summary> 752<table> 753<tbody><tr><th>Version</th><th>Changes</th></tr> 754<tr><td>v18.0.0</td> 755<td><p>No longer behind <code>--experimental-global-fetch</code> CLI flag.</p></td></tr> 756<tr><td>v17.5.0</td> 757<td><p><span>Added in: v17.5.0</span></p></td></tr> 758</tbody></table> 759</details> 760</div> 761<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Disable this API with the <a href="cli.html#--no-experimental-fetch"><code>--no-experimental-fetch</code></a> 762CLI flag.</div><p></p> 763<p>A browser-compatible implementation of the <a href="https://developer.mozilla.org/en-US/docs/Web/API/fetch"><code>fetch()</code></a> function.</p> 764</section><section><h3>Class <code>FormData</code><span><a class="mark" href="#class-formdata" id="class-formdata">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_formdata"></a></h3> 765<div class="api_metadata"> 766<details class="changelog"><summary>History</summary> 767<table> 768<tbody><tr><th>Version</th><th>Changes</th></tr> 769<tr><td>v18.0.0</td> 770<td><p>No longer behind <code>--experimental-global-fetch</code> CLI flag.</p></td></tr> 771<tr><td>v17.6.0</td> 772<td><p><span>Added in: v17.6.0</span></p></td></tr> 773</tbody></table> 774</details> 775</div> 776<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Disable this API with the <a href="cli.html#--no-experimental-fetch"><code>--no-experimental-fetch</code></a> 777CLI flag.</div><p></p> 778<p>A browser-compatible implementation of <a href="https://developer.mozilla.org/en-US/docs/Web/API/FormData" class="type"><FormData></a>.</p> 779</section><section><h3><code>global</code><span><a class="mark" href="#global" id="global">#</a></span><a aria-hidden="true" class="legacy" id="globals_global"></a></h3> 780<div class="api_metadata"> 781<span>Added in: v0.1.27</span> 782</div> 783 784<p></p><div class="api_stability api_stability_3"><a href="documentation.html#stability-index">Stability: 3</a> - Legacy. Use <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/globalThis"><code>globalThis</code></a> instead.</div><p></p> 785<ul> 786<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type"><Object></a> The global namespace object.</li> 787</ul> 788<p>In browsers, the top-level scope has traditionally been the global scope. This 789means that <code>var something</code> will define a new global variable, except within 790ECMAScript modules. In Node.js, this is different. The top-level scope is not 791the global scope; <code>var something</code> inside a Node.js module will be local to that 792module, regardless of whether it is a <a href="modules.html">CommonJS module</a> or an 793<a href="esm.html">ECMAScript module</a>.</p> 794</section><section><h3>Class <code>Headers</code><span><a class="mark" href="#class-headers" id="class-headers">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_headers"></a></h3> 795<div class="api_metadata"> 796<details class="changelog"><summary>History</summary> 797<table> 798<tbody><tr><th>Version</th><th>Changes</th></tr> 799<tr><td>v18.0.0</td> 800<td><p>No longer behind <code>--experimental-global-fetch</code> CLI flag.</p></td></tr> 801<tr><td>v17.5.0</td> 802<td><p><span>Added in: v17.5.0</span></p></td></tr> 803</tbody></table> 804</details> 805</div> 806<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Disable this API with the <a href="cli.html#--no-experimental-fetch"><code>--no-experimental-fetch</code></a> 807CLI flag.</div><p></p> 808<p>A browser-compatible implementation of <a href="https://developer.mozilla.org/en-US/docs/Web/API/Headers" class="type"><Headers></a>.</p> 809</section><section><h3><code>MessageChannel</code><span><a class="mark" href="#messagechannel" id="messagechannel">#</a></span><a aria-hidden="true" class="legacy" id="globals_messagechannel"></a></h3> 810<div class="api_metadata"> 811<span>Added in: v15.0.0</span> 812</div> 813 814<p>The <code>MessageChannel</code> class. See <a href="worker_threads.html#class-messagechannel"><code>MessageChannel</code></a> for more details.</p> 815</section><section><h3><code>MessageEvent</code><span><a class="mark" href="#messageevent" id="messageevent">#</a></span><a aria-hidden="true" class="legacy" id="globals_messageevent"></a></h3> 816<div class="api_metadata"> 817<span>Added in: v15.0.0</span> 818</div> 819 820<p>The <code>MessageEvent</code> class. See <a href="https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent/MessageEvent"><code>MessageEvent</code></a> for more details.</p> 821</section><section><h3><code>MessagePort</code><span><a class="mark" href="#messageport" id="messageport">#</a></span><a aria-hidden="true" class="legacy" id="globals_messageport"></a></h3> 822<div class="api_metadata"> 823<span>Added in: v15.0.0</span> 824</div> 825 826<p>The <code>MessagePort</code> class. See <a href="worker_threads.html#class-messageport"><code>MessagePort</code></a> for more details.</p> 827</section><section><h3><code>module</code><span><a class="mark" href="#module" id="module">#</a></span><a aria-hidden="true" class="legacy" id="globals_module"></a></h3> 828<p>This variable may appear to be global but is not. See <a href="modules.html#module"><code>module</code></a>.</p> 829</section><section><h3><code>performance</code><span><a class="mark" href="#performance" id="performance">#</a></span><a aria-hidden="true" class="legacy" id="globals_performance"></a></h3> 830<div class="api_metadata"> 831<span>Added in: v16.0.0</span> 832</div> 833<p>The <a href="perf_hooks.html#perf_hooksperformance"><code>perf_hooks.performance</code></a> object.</p> 834</section><section><h3><code>process</code><span><a class="mark" href="#process" id="process">#</a></span><a aria-hidden="true" class="legacy" id="globals_process"></a></h3> 835<div class="api_metadata"> 836<span>Added in: v0.1.7</span> 837</div> 838 839<ul> 840<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type"><Object></a></li> 841</ul> 842<p>The process object. See the <a href="process.html#process"><code>process</code> object</a> section.</p> 843</section><section><h3><code>queueMicrotask(callback)</code><span><a class="mark" href="#queuemicrotaskcallback" id="queuemicrotaskcallback">#</a></span><a aria-hidden="true" class="legacy" id="globals_queuemicrotask_callback"></a></h3> 844<div class="api_metadata"> 845<span>Added in: v11.0.0</span> 846</div> 847 848<ul> 849<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type"><Function></a> Function to be queued.</li> 850</ul> 851<p>The <code>queueMicrotask()</code> method queues a microtask to invoke <code>callback</code>. If 852<code>callback</code> throws an exception, the <a href="process.html#process"><code>process</code> object</a> <code>'uncaughtException'</code> 853event will be emitted.</p> 854<p>The microtask queue is managed by V8 and may be used in a similar manner to 855the <a href="process.html#processnexttickcallback-args"><code>process.nextTick()</code></a> queue, which is managed by Node.js. The 856<code>process.nextTick()</code> queue is always processed before the microtask queue 857within each turn of the Node.js event loop.</p> 858<pre><code class="language-js"><span class="hljs-comment">// Here, `queueMicrotask()` is used to ensure the 'load' event is always</span> 859<span class="hljs-comment">// emitted asynchronously, and therefore consistently. Using</span> 860<span class="hljs-comment">// `process.nextTick()` here would result in the 'load' event always emitting</span> 861<span class="hljs-comment">// before any other promise jobs.</span> 862 863<span class="hljs-title class_">DataHandler</span>.<span class="hljs-property"><span class="hljs-keyword">prototype</span></span>.<span class="hljs-property">load</span> = <span class="hljs-keyword">async</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">load</span>(<span class="hljs-params">key</span>) { 864 <span class="hljs-keyword">const</span> hit = <span class="hljs-variable language_">this</span>.<span class="hljs-property">_cache</span>.<span class="hljs-title function_">get</span>(key); 865 <span class="hljs-keyword">if</span> (hit !== <span class="hljs-literal">undefined</span>) { 866 <span class="hljs-title function_">queueMicrotask</span>(<span class="hljs-function">() =></span> { 867 <span class="hljs-variable language_">this</span>.<span class="hljs-title function_">emit</span>(<span class="hljs-string">'load'</span>, hit); 868 }); 869 <span class="hljs-keyword">return</span>; 870 } 871 872 <span class="hljs-keyword">const</span> data = <span class="hljs-keyword">await</span> <span class="hljs-title function_">fetchData</span>(key); 873 <span class="hljs-variable language_">this</span>.<span class="hljs-property">_cache</span>.<span class="hljs-title function_">set</span>(key, data); 874 <span class="hljs-variable language_">this</span>.<span class="hljs-title function_">emit</span>(<span class="hljs-string">'load'</span>, data); 875};</code> <button class="copy-button">copy</button></pre> 876</section><section><h3>Class: <code>ReadableByteStreamController</code><span><a class="mark" href="#class-readablebytestreamcontroller" id="class-readablebytestreamcontroller">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_readablebytestreamcontroller"></a></h3> 877<div class="api_metadata"> 878<span>Added in: v18.0.0</span> 879</div> 880<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 881<p>A browser-compatible implementation of <a href="webstreams.html#class-readablebytestreamcontroller"><code>ReadableByteStreamController</code></a>.</p> 882</section><section><h3>Class: <code>ReadableStream</code><span><a class="mark" href="#class-readablestream" id="class-readablestream">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_readablestream"></a></h3> 883<div class="api_metadata"> 884<span>Added in: v18.0.0</span> 885</div> 886<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 887<p>A browser-compatible implementation of <a href="webstreams.html#class-readablestream"><code>ReadableStream</code></a>.</p> 888</section><section><h3>Class: <code>ReadableStreamBYOBReader</code><span><a class="mark" href="#class-readablestreambyobreader" id="class-readablestreambyobreader">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_readablestreambyobreader"></a></h3> 889<div class="api_metadata"> 890<span>Added in: v18.0.0</span> 891</div> 892<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 893<p>A browser-compatible implementation of <a href="webstreams.html#class-readablestreambyobreader"><code>ReadableStreamBYOBReader</code></a>.</p> 894</section><section><h3>Class: <code>ReadableStreamBYOBRequest</code><span><a class="mark" href="#class-readablestreambyobrequest" id="class-readablestreambyobrequest">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_readablestreambyobrequest"></a></h3> 895<div class="api_metadata"> 896<span>Added in: v18.0.0</span> 897</div> 898<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 899<p>A browser-compatible implementation of <a href="webstreams.html#class-readablestreambyobrequest"><code>ReadableStreamBYOBRequest</code></a>.</p> 900</section><section><h3>Class: <code>ReadableStreamDefaultController</code><span><a class="mark" href="#class-readablestreamdefaultcontroller" id="class-readablestreamdefaultcontroller">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_readablestreamdefaultcontroller"></a></h3> 901<div class="api_metadata"> 902<span>Added in: v18.0.0</span> 903</div> 904<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 905<p>A browser-compatible implementation of <a href="webstreams.html#class-readablestreamdefaultcontroller"><code>ReadableStreamDefaultController</code></a>.</p> 906</section><section><h3>Class: <code>ReadableStreamDefaultReader</code><span><a class="mark" href="#class-readablestreamdefaultreader" id="class-readablestreamdefaultreader">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_readablestreamdefaultreader"></a></h3> 907<div class="api_metadata"> 908<span>Added in: v18.0.0</span> 909</div> 910<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 911<p>A browser-compatible implementation of <a href="webstreams.html#class-readablestreamdefaultreader"><code>ReadableStreamDefaultReader</code></a>.</p> 912</section><section><h3><code>require()</code><span><a class="mark" href="#require" id="require">#</a></span><a aria-hidden="true" class="legacy" id="globals_require"></a></h3> 913<p>This variable may appear to be global but is not. See <a href="modules.html#requireid"><code>require()</code></a>.</p> 914</section><section><h3><code>Response</code><span><a class="mark" href="#response" id="response">#</a></span><a aria-hidden="true" class="legacy" id="globals_response"></a></h3> 915<div class="api_metadata"> 916<details class="changelog"><summary>History</summary> 917<table> 918<tbody><tr><th>Version</th><th>Changes</th></tr> 919<tr><td>v18.0.0</td> 920<td><p>No longer behind <code>--experimental-global-fetch</code> CLI flag.</p></td></tr> 921<tr><td>v17.5.0</td> 922<td><p><span>Added in: v17.5.0</span></p></td></tr> 923</tbody></table> 924</details> 925</div> 926<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Disable this API with the <a href="cli.html#--no-experimental-fetch"><code>--no-experimental-fetch</code></a> 927CLI flag.</div><p></p> 928<p>A browser-compatible implementation of <a href="https://developer.mozilla.org/en-US/docs/Web/API/Response" class="type"><Response></a>.</p> 929</section><section><h3><code>Request</code><span><a class="mark" href="#request" id="request">#</a></span><a aria-hidden="true" class="legacy" id="globals_request"></a></h3> 930<div class="api_metadata"> 931<details class="changelog"><summary>History</summary> 932<table> 933<tbody><tr><th>Version</th><th>Changes</th></tr> 934<tr><td>v18.0.0</td> 935<td><p>No longer behind <code>--experimental-global-fetch</code> CLI flag.</p></td></tr> 936<tr><td>v17.5.0</td> 937<td><p><span>Added in: v17.5.0</span></p></td></tr> 938</tbody></table> 939</details> 940</div> 941<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Disable this API with the <a href="cli.html#--no-experimental-fetch"><code>--no-experimental-fetch</code></a> 942CLI flag.</div><p></p> 943<p>A browser-compatible implementation of <a href="https://developer.mozilla.org/en-US/docs/Web/API/Request" class="type"><Request></a>.</p> 944</section><section><h3><code>setImmediate(callback[, ...args])</code><span><a class="mark" href="#setimmediatecallback-args" id="setimmediatecallback-args">#</a></span><a aria-hidden="true" class="legacy" id="globals_setimmediate_callback_args"></a></h3> 945<div class="api_metadata"> 946<span>Added in: v0.9.1</span> 947</div> 948 949<p><a href="timers.html#setimmediatecallback-args"><code>setImmediate</code></a> is described in the <a href="timers.html">timers</a> section.</p> 950</section><section><h3><code>setInterval(callback, delay[, ...args])</code><span><a class="mark" href="#setintervalcallback-delay-args" id="setintervalcallback-delay-args">#</a></span><a aria-hidden="true" class="legacy" id="globals_setinterval_callback_delay_args"></a></h3> 951<div class="api_metadata"> 952<span>Added in: v0.0.1</span> 953</div> 954 955<p><a href="timers.html#setintervalcallback-delay-args"><code>setInterval</code></a> is described in the <a href="timers.html">timers</a> section.</p> 956</section><section><h3><code>setTimeout(callback, delay[, ...args])</code><span><a class="mark" href="#settimeoutcallback-delay-args" id="settimeoutcallback-delay-args">#</a></span><a aria-hidden="true" class="legacy" id="globals_settimeout_callback_delay_args"></a></h3> 957<div class="api_metadata"> 958<span>Added in: v0.0.1</span> 959</div> 960 961<p><a href="timers.html#settimeoutcallback-delay-args"><code>setTimeout</code></a> is described in the <a href="timers.html">timers</a> section.</p> 962</section><section><h3><code>structuredClone(value[, options])</code><span><a class="mark" href="#structuredclonevalue-options" id="structuredclonevalue-options">#</a></span><a aria-hidden="true" class="legacy" id="globals_structuredclone_value_options"></a></h3> 963<div class="api_metadata"> 964<span>Added in: v17.0.0</span> 965</div> 966 967<p>The WHATWG <a href="https://developer.mozilla.org/en-US/docs/Web/API/structuredClone"><code>structuredClone</code></a> method.</p> 968</section><section><h3><code>SubtleCrypto</code><span><a class="mark" href="#subtlecrypto" id="subtlecrypto">#</a></span><a aria-hidden="true" class="legacy" id="globals_subtlecrypto"></a></h3> 969<div class="api_metadata"> 970<span>Added in: v17.6.0</span> 971</div> 972<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental. Enable this API with the 973<a href="cli.html#--experimental-global-webcrypto"><code>--experimental-global-webcrypto</code></a> CLI flag.</div><p></p> 974<p>A browser-compatible implementation of <a href="webcrypto.html#class-subtlecrypto" class="type"><SubtleCrypto></a>. This global is available 975only if the Node.js binary was compiled with including support for the 976<code>node:crypto</code> module.</p> 977</section><section><h3><code>DOMException</code><span><a class="mark" href="#domexception" id="domexception">#</a></span><a aria-hidden="true" class="legacy" id="globals_domexception"></a></h3> 978<div class="api_metadata"> 979<span>Added in: v17.0.0</span> 980</div> 981 982<p>The WHATWG <code>DOMException</code> class. See <a href="https://developer.mozilla.org/en-US/docs/Web/API/DOMException"><code>DOMException</code></a> for more details.</p> 983</section><section><h3><code>TextDecoder</code><span><a class="mark" href="#textdecoder" id="textdecoder">#</a></span><a aria-hidden="true" class="legacy" id="globals_textdecoder"></a></h3> 984<div class="api_metadata"> 985<span>Added in: v11.0.0</span> 986</div> 987 988<p>The WHATWG <code>TextDecoder</code> class. See the <a href="util.html#class-utiltextdecoder"><code>TextDecoder</code></a> section.</p> 989</section><section><h3>Class: <code>TextDecoderStream</code><span><a class="mark" href="#class-textdecoderstream" id="class-textdecoderstream">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_textdecoderstream"></a></h3> 990<div class="api_metadata"> 991<span>Added in: v18.0.0</span> 992</div> 993<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 994<p>A browser-compatible implementation of <a href="webstreams.html#class-textdecoderstream"><code>TextDecoderStream</code></a>.</p> 995</section><section><h3><code>TextEncoder</code><span><a class="mark" href="#textencoder" id="textencoder">#</a></span><a aria-hidden="true" class="legacy" id="globals_textencoder"></a></h3> 996<div class="api_metadata"> 997<span>Added in: v11.0.0</span> 998</div> 999 1000<p>The WHATWG <code>TextEncoder</code> class. See the <a href="util.html#class-utiltextencoder"><code>TextEncoder</code></a> section.</p> 1001</section><section><h3>Class: <code>TextEncoderStream</code><span><a class="mark" href="#class-textencoderstream" id="class-textencoderstream">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_textencoderstream"></a></h3> 1002<div class="api_metadata"> 1003<span>Added in: v18.0.0</span> 1004</div> 1005<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 1006<p>A browser-compatible implementation of <a href="webstreams.html#class-textencoderstream"><code>TextEncoderStream</code></a>.</p> 1007</section><section><h3>Class: <code>TransformStream</code><span><a class="mark" href="#class-transformstream" id="class-transformstream">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_transformstream"></a></h3> 1008<div class="api_metadata"> 1009<span>Added in: v18.0.0</span> 1010</div> 1011<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 1012<p>A browser-compatible implementation of <a href="webstreams.html#class-transformstream"><code>TransformStream</code></a>.</p> 1013</section><section><h3>Class: <code>TransformStreamDefaultController</code><span><a class="mark" href="#class-transformstreamdefaultcontroller" id="class-transformstreamdefaultcontroller">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_transformstreamdefaultcontroller"></a></h3> 1014<div class="api_metadata"> 1015<span>Added in: v18.0.0</span> 1016</div> 1017<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 1018<p>A browser-compatible implementation of <a href="webstreams.html#class-transformstreamdefaultcontroller"><code>TransformStreamDefaultController</code></a>.</p> 1019</section><section><h3><code>URL</code><span><a class="mark" href="#url" id="url">#</a></span><a aria-hidden="true" class="legacy" id="globals_url"></a></h3> 1020<div class="api_metadata"> 1021<span>Added in: v10.0.0</span> 1022</div> 1023 1024<p>The WHATWG <code>URL</code> class. See the <a href="url.html#class-url"><code>URL</code></a> section.</p> 1025</section><section><h3><code>URLSearchParams</code><span><a class="mark" href="#urlsearchparams" id="urlsearchparams">#</a></span><a aria-hidden="true" class="legacy" id="globals_urlsearchparams"></a></h3> 1026<div class="api_metadata"> 1027<span>Added in: v10.0.0</span> 1028</div> 1029 1030<p>The WHATWG <code>URLSearchParams</code> class. See the <a href="url.html#class-urlsearchparams"><code>URLSearchParams</code></a> section.</p> 1031</section><section><h3><code>WebAssembly</code><span><a class="mark" href="#webassembly" id="webassembly">#</a></span><a aria-hidden="true" class="legacy" id="globals_webassembly"></a></h3> 1032<div class="api_metadata"> 1033<span>Added in: v8.0.0</span> 1034</div> 1035 1036<ul> 1037<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type"><Object></a></li> 1038</ul> 1039<p>The object that acts as the namespace for all W3C 1040<a href="https://webassembly.org">WebAssembly</a> related functionality. See the 1041<a href="https://developer.mozilla.org/en-US/docs/WebAssembly">Mozilla Developer Network</a> for usage and compatibility.</p> 1042</section><section><h3>Class: <code>WritableStream</code><span><a class="mark" href="#class-writablestream" id="class-writablestream">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_writablestream"></a></h3> 1043<div class="api_metadata"> 1044<span>Added in: v18.0.0</span> 1045</div> 1046<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 1047<p>A browser-compatible implementation of <a href="webstreams.html#class-writablestream"><code>WritableStream</code></a>.</p> 1048</section><section><h3>Class: <code>WritableStreamDefaultController</code><span><a class="mark" href="#class-writablestreamdefaultcontroller" id="class-writablestreamdefaultcontroller">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_writablestreamdefaultcontroller"></a></h3> 1049<div class="api_metadata"> 1050<span>Added in: v18.0.0</span> 1051</div> 1052<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 1053<p>A browser-compatible implementation of <a href="webstreams.html#class-writablestreamdefaultcontroller"><code>WritableStreamDefaultController</code></a>.</p> 1054</section><section><h3>Class: <code>WritableStreamDefaultWriter</code><span><a class="mark" href="#class-writablestreamdefaultwriter" id="class-writablestreamdefaultwriter">#</a></span><a aria-hidden="true" class="legacy" id="globals_class_writablestreamdefaultwriter"></a></h3> 1055<div class="api_metadata"> 1056<span>Added in: v18.0.0</span> 1057</div> 1058<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental.</div><p></p> 1059<p>A browser-compatible implementation of <a href="webstreams.html#class-writablestreamdefaultwriter"><code>WritableStreamDefaultWriter</code></a>.</p></section> 1060 <!-- API END --> 1061 </div> 1062 </div> 1063 </div> 1064</body> 1065</html> 1066