---
title: Standard built-in objects
slug: Web/JavaScript/Reference/Global_Objects
tags:
  - JavaScript
  - NeedsTranslation
  - TopicStub
translation_of: Web/JavaScript/Reference/Global_Objects
---
<div>
 <div>
  {{jsSidebar("Objects")}}</div>
</div>
<h2 id="Summary" name="Summary">Summary</h2>
<p>This chapter documents all the JavaScript standard built-in objects, along with their methods and properties.</p>
<div class="onlyinclude">
 <p>The term "global objects" (or standard built-in objects) here is not to be confused with the <em>global object</em>. Here, global objects refer to <em>objects in the global scope</em> (but only if ECMAScript 5 strict mode is not used! Otherwise it returns <code>undefined</code>). The <em>global object</em> itself can be accessed by the {{jsxref("Operators/this", "this")}} operator in the global scope. In fact, the global scope <em>consists</em><em> of</em> the properties of the global object (including inherited properties, if any).</p>
 <p>Other objects in the global scope are either <a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Creating_new_objects">created by the user script</a> or provided by the host application. The host objects available in browser contexts are documented in the <a href="/en-US/docs/Web/API/Reference">API reference</a>. For more information about the distinction between the <a href="/en-US/docs/DOM/DOM_Reference">DOM</a> and core <a href="/en-US/docs/Web/JavaScript">JavaScript</a>, see <a href="/en-US/docs/Web/JavaScript/JavaScript_technologies_overview">JavaScript technologies overview</a>.</p>
 <h2 id="Standard_objects_(by_category)">Standard objects (by category)</h2>
 <h3 id="Value_properties">Value properties</h3>
 <p>Global properties returning a simple value.</p>
 <ul>
  <li>{{jsxref("Infinity")}}</li>
  <li>{{jsxref("NaN")}}</li>
  <li>{{jsxref("undefined")}}</li>
  <li>{{jsxref("null")}} literal</li>
 </ul>
 <h3 id="Function_properties">Function properties</h3>
 <p>Global functions returning the result of a specific routine.</p>
 <ul>
  <li>{{jsxref("Global_Objects/eval", "eval()")}}</li>
  <li>{{jsxref("Global_Objects/uneval", "uneval()")}} {{non-standard_inline()}}</li>
  <li>{{jsxref("Global_Objects/isFinite", "isFinite()")}}</li>
  <li>{{jsxref("Global_Objects/isNaN", "isNaN()")}}</li>
  <li>{{jsxref("Global_Objects/parseFloat", "parseFloat()")}}</li>
  <li>{{jsxref("Global_Objects/parseInt", "parseInt()")}}</li>
  <li>{{jsxref("Global_Objects/decodeURI", "decodeURI()")}}</li>
  <li>{{jsxref("Global_Objects/decodeURIComponent", "decodeURIComponent()")}}</li>
  <li>{{jsxref("Global_Objects/encodeURI", "encodeURI()")}}</li>
  <li>{{jsxref("Global_Objects/encodeURIComponent", "encodeURIComponent()")}}</li>
  <li>{{jsxref("Global_Objects/escape", "escape()")}} {{deprecated_inline()}}</li>
  <li>{{jsxref("Global_Objects/unescape", "unescape()")}} {{deprecated_inline()}}</li>
 </ul>
 <h3 id="Fundamental_objects">Fundamental objects</h3>
 <p>General language objects, functions and errors.</p>
 <ul>
  <li>{{jsxref("Object")}}</li>
  <li>{{jsxref("Function")}}</li>
  <li>{{jsxref("Boolean")}}</li>
  <li>{{jsxref("Symbol")}} {{experimental_inline()}}</li>
  <li>{{jsxref("Error")}}</li>
  <li>{{jsxref("EvalError")}}</li>
  <li>{{jsxref("InternalError")}}</li>
  <li>{{jsxref("RangeError")}}</li>
  <li>{{jsxref("ReferenceError")}}</li>
  <li>{{jsxref("StopIteration")}}</li>
  <li>{{jsxref("SyntaxError")}}</li>
  <li>{{jsxref("TypeError")}}</li>
  <li>{{jsxref("URIError")}}</li>
 </ul>
 <h3 id="Numbers_and_dates">Numbers and dates</h3>
 <p>Objects dealing with numbers, dates and mathematical calculations.</p>
 <ul>
  <li>{{jsxref("Number")}}</li>
  <li>{{jsxref("Math")}}</li>
  <li>{{jsxref("Date")}}</li>
 </ul>
 <h3 id="Text_processing">Text processing</h3>
 <p>Objects for manipulating texts.</p>
 <ul>
  <li>{{jsxref("String")}}</li>
  <li>{{jsxref("RegExp")}}</li>
 </ul>
 <h3 id="Indexed_collections">Indexed collections</h3>
 <p>Collections ordered by an index. Array-type objects.</p>
 <ul>
  <li>{{jsxref("Array")}}</li>
  <li>{{jsxref("Int8Array")}}</li>
  <li>{{jsxref("Uint8Array")}}</li>
  <li>{{jsxref("Uint8ClampedArray")}}</li>
  <li>{{jsxref("Int16Array")}}</li>
  <li>{{jsxref("Uint16Array")}}</li>
  <li>{{jsxref("Int32Array")}}</li>
  <li>{{jsxref("Uint32Array")}}</li>
  <li>{{jsxref("Float32Array")}}</li>
  <li>{{jsxref("Float64Array")}}</li>
  <li>{{jsxref("ParallelArray")}} {{non-standard_inline()}}</li>
 </ul>
 <h3 id="Keyed_collections">Keyed collections</h3>
 <p>Collections of objects as keys. Elements iterable in insertion order.</p>
 <ul>
  <li>{{jsxref("Map")}} {{experimental_inline()}}</li>
  <li>{{jsxref("Set")}} {{experimental_inline()}}</li>
  <li>{{jsxref("WeakMap")}} {{experimental_inline()}}</li>
  <li>{{jsxref("WeakSet")}} {{experimental_inline()}}</li>
 </ul>
 <h3 id="Structured_data">Structured data</h3>
 <p>Data buffers and <strong>J</strong>ava<strong>S</strong>cript <strong>O</strong>bject <strong>N</strong>otation.</p>
 <ul>
  <li>{{jsxref("ArrayBuffer")}}</li>
  <li>{{jsxref("DataView")}}</li>
  <li>{{jsxref("JSON")}}</li>
 </ul>
 <h3 id="Control_abstraction_objects">Control abstraction objects</h3>
 <ul>
  <li>{{jsxref("Iterator")}} {{non-standard_inline()}}</li>
  <li>{{jsxref("Generator")}} {{experimental_inline()}}</li>
  <li>{{jsxref("Promise")}} {{experimental_inline()}}</li>
 </ul>
 <h3 id="Reflection">Reflection</h3>
 <ul>
  <li>{{jsxref("Reflect")}} {{experimental_inline()}}</li>
  <li>{{jsxref("Proxy")}} {{experimental_inline()}}</li>
 </ul>
 <h3 id="Internationalization">Internationalization</h3>
 <p>Additions to the ECMAScript core for language-sensitive functionalities.</p>
 <ul>
  <li>{{jsxref("Intl")}}</li>
  <li>{{jsxref("Global_Objects/Collator", "Intl.Collator")}}</li>
  <li>{{jsxref("Global_Objects/DateTimeFormat", "Intl.DateTimeFormat")}}</li>
  <li>{{jsxref("Global_Objects/NumberFormat", "Intl.NumberFormat")}}</li>
 </ul>
 <h3 id="Other">Other</h3>
 <ul>
  <li><code><a href="/en-US/docs/Web/JavaScript/Reference/Functions/arguments">arguments</a></code></li>
 </ul>
</div>
<p> </p>