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+---
+title: Uint16Array
+slug: Web/JavaScript/Referencje/Obiekty/Uint16Array
+translation_of: Web/JavaScript/Reference/Global_Objects/Uint16Array
+---
+<div>{{JSRef("Global_Objects", "TypedArray", "Int8Array,Uint8Array,Uint8ClampedArray,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array")}}</div>
+
+<h2 id="Summary">Summary</h2>
+
+<p>The <strong><code>Uint16Array</code></strong> typed array represents an array of 16-bit unsigned integers in the platform byte order. If control over byte order is needed, use {{jsxref("DataView")}} instead. The contents are initialized to <code>0</code>. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).</p>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox">Uint16Array(length);
+Uint16Array(typedArray);
+Uint16Array(object);
+Uint16Array(buffer [, byteOffset [, length]]);</pre>
+
+<p>For more information about the constructor syntax and the parameters, see <em><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray#Syntax">TypedArray</a></em>.</p>
+
+<h2 id="Properties">Properties</h2>
+
+<dl>
+ <dt>{{jsxref("TypedArray.BYTES_PER_ELEMENT", "Uint16Array.BYTES_PER_ELEMENT")}}</dt>
+ <dd>Returns a number value of the element size. <code>2</code> in the case of an <code>Uint16Array</code>.</dd>
+ <dt>Uint16Array.length</dt>
+ <dd>Length property whose value is 3.</dd>
+ <dt>{{jsxref("TypedArray.name", "Uint16Array.name")}}</dt>
+ <dd>Returns the string value of the constructor name. In the case of the <code>Uint16Array</code> type: "Uint16Array".</dd>
+ <dt>{{jsxref("TypedArray.prototype", "Uint16Array.prototype")}}</dt>
+ <dd>Prototype for the <em>TypedArray</em> objects.</dd>
+</dl>
+
+<h2 id="Methods">Methods</h2>
+
+<dl>
+ <dt>{{jsxref("TypedArray.from", "Uint16Array.from()")}}</dt>
+ <dd>Creates a new <code>Uint16Array</code> from an array-like or iterable object. See also {{jsxref("Array.from()")}}.</dd>
+ <dt>{{jsxref("TypedArray.of", "Uint16Array.of()")}}</dt>
+ <dd>Creates a new <code>Uint16Array</code> with a variable number of arguments. See also {{jsxref("Array.of()")}}.</dd>
+</dl>
+
+<h2 id="Boolean_instances" name="Boolean_instances"><code>Uint16Array</code> prototype</h2>
+
+<p>All <code>Uint16Array</code> objects inherit from {{jsxref("TypedArray.prototype", "%TypedArray%.prototype")}}.</p>
+
+<h3 id="Properties_2">Properties</h3>
+
+<dl>
+ <dt><code>Uint16Array.prototype.constructor</code></dt>
+ <dd>Returns the function that created an instance's prototype. This is the <code>Uint16Array</code> constructor by default.</dd>
+ <dt>{{jsxref("TypedArray.prototype.buffer", "Uint16Array.prototype.buffer")}} {{readonlyInline}}</dt>
+ <dd>Returns the {{jsxref("ArrayBuffer")}} referenced by the <code>Uint16Array</code> Fixed at construction time and thus <strong>read only</strong>.</dd>
+ <dt>{{jsxref("TypedArray.prototype.byteLength", "Uint16Array.prototype.byteLength")}} {{readonlyInline}}</dt>
+ <dd>Returns the length (in bytes) of the <code>Uint16Array</code> from the start of its {{jsxref("ArrayBuffer")}}. Fixed at construction time and thus <strong>read only.</strong></dd>
+ <dt>{{jsxref("TypedArray.prototype.byteOffset", "Uint16Array.prototype.byteOffset")}} {{readonlyInline}}</dt>
+ <dd>Returns the offset (in bytes) of the <code>Uint16Array</code> from the start of its {{jsxref("ArrayBuffer")}}. Fixed at construction time and thus <strong>read only.</strong></dd>
+ <dt>{{jsxref("TypedArray.prototype.length", "Uint16Array.prototype.length")}} {{readonlyInline}}</dt>
+ <dd>Returns the number of elements hold in the <code>Uint16Array</code>. Fixed at construction time and thus <strong>read only.</strong></dd>
+</dl>
+
+<h3 id="Methods_2">Methods</h3>
+
+<dl>
+ <dt>{{jsxref("TypedArray.copyWithin", "Uint16Array.prototype.copyWithin()")}}</dt>
+ <dd>Copies a sequence of array elements within the array. See also {{jsxref("Array.prototype.copyWithin()")}}.</dd>
+ <dt>{{jsxref("TypedArray.entries", "Uint16Array.prototype.entries()")}}</dt>
+ <dd>Returns a new <code>Array Iterator</code> object that contains the key/value pairs for each index in the array. See also {{jsxref("Array.prototype.entries()")}}.</dd>
+ <dt>{{jsxref("TypedArray.every", "Uint16Array.prototype.every()")}}</dt>
+ <dd>Tests whether all elements in the array pass the test provided by a function. See also {{jsxref("Array.prototype.every()")}}.</dd>
+ <dt>{{jsxref("TypedArray.fill", "Uint16Array.prototype.fill()")}}</dt>
+ <dd>Fills all the elements of an array from a start index to an end index with a static value. See also {{jsxref("Array.prototype.fill()")}}.</dd>
+ <dt>{{jsxref("TypedArray.filter", "Uint16Array.prototype.filter()")}}</dt>
+ <dd>Creates a new array with all of the elements of this array for which the provided filtering function returns true. See also {{jsxref("Array.prototype.filter()")}}.</dd>
+ <dt>{{jsxref("TypedArray.find", "Uint16Array.prototype.find()")}}</dt>
+ <dd>Returns the found value in the array, if an element in the array satisfies the provided testing function or <code>undefined</code> if not found. See also {{jsxref("Array.prototype.find()")}}.</dd>
+ <dt>{{jsxref("TypedArray.findIndex", "Uint16Array.prototype.findIndex()")}}</dt>
+ <dd>Returns the found index in the array, if an element in the array satisfies the provided testing function or -1 if not found. See also {{jsxref("Array.prototype.findIndex()")}}.</dd>
+ <dt>{{jsxref("TypedArray.forEach", "Uint16Array.prototype.forEach()")}}</dt>
+ <dd>Calls a function for each element in the array. See also {{jsxref("Array.prototype.forEach()")}}.</dd>
+ <dt>{{jsxref("TypedArray.includes", "Uint16Array.prototype.includes()")}} {{experimental_inline}}</dt>
+ <dd>Determines whether a typed array includes a certain element, returning <code>true</code> or <code>false</code> as appropriate. See also {{jsxref("Array.prototype.includes()")}}.</dd>
+ <dt>{{jsxref("TypedArray.indexOf", "Uint16Array.prototype.indexOf()")}}</dt>
+ <dd>Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found. See also {{jsxref("Array.prototype.indexOf()")}}.</dd>
+ <dt>{{jsxref("TypedArray.join", "Uint16Array.prototype.join()")}}</dt>
+ <dd>Joins all elements of an array into a string. See also {{jsxref("Array.prototype.join()")}}.</dd>
+ <dt>{{jsxref("TypedArray.keys", "Uint16Array.prototype.keys()")}}</dt>
+ <dd>Returns a new <code>Array Iterator</code> that contains the keys for each index in the array. See also {{jsxref("Array.prototype.keys()")}}.</dd>
+ <dt>{{jsxref("TypedArray.lastIndexOf", "Uint16Array.prototype.lastIndexOf()")}}</dt>
+ <dd>Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found. See also {{jsxref("Array.prototype.lastIndexOf()")}}.</dd>
+ <dt>{{jsxref("TypedArray.map", "Uint16Array.prototype.map()")}}</dt>
+ <dd>Creates a new array with the results of calling a provided function on every element in this array. See also {{jsxref("Array.prototype.map()")}}.</dd>
+ <dt>{{jsxref("TypedArray.move", "Uint16Array.prototype.move()")}} {{non-standard_inline}} {{unimplemented_inline}}</dt>
+ <dd>Former non-standard version of {{jsxref("TypedArray.copyWithin", "Uint16Array.prototype.copyWithin()")}}.</dd>
+ <dt>{{jsxref("TypedArray.reduce", "Uint16Array.prototype.reduce()")}}</dt>
+ <dd>Apply a function against an accumulator and each value of the array (from left-to-right) as to reduce it to a single value. See also {{jsxref("Array.prototype.reduce()")}}.</dd>
+ <dt>{{jsxref("TypedArray.reduceRight", "Uint16Array.prototype.reduceRight()")}}</dt>
+ <dd>Apply a function against an accumulator and each value of the array (from right-to-left) as to reduce it to a single value. See also {{jsxref("Array.prototype.reduceRight()")}}.</dd>
+ <dt>{{jsxref("TypedArray.reverse", "Uint16Array.prototype.reverse()")}}</dt>
+ <dd>Reverses the order of the elements of an array — the first becomes the last, and the last becomes the first. See also {{jsxref("Array.prototype.reverse()")}}.</dd>
+ <dt>{{jsxref("TypedArray.set", "Uint16Array.prototype.set()")}}</dt>
+ <dd>Stores multiple values in the typed array, reading input values from a specified array.</dd>
+ <dt>{{jsxref("TypedArray.slice", "Uint16Array.prototype.slice()")}}</dt>
+ <dd>Extracts a section of an array and returns a new array. See also {{jsxref("Array.prototype.slice()")}}.</dd>
+ <dt>{{jsxref("TypedArray.some", "Uint16Array.prototype.some()")}}</dt>
+ <dd>Returns true if at least one element in this array satisfies the provided testing function. See also {{jsxref("Array.prototype.some()")}}.</dd>
+ <dt>{{jsxref("TypedArray.sort", "Uint16Array.prototype.sort()")}}</dt>
+ <dd>Sorts the elements of an array in place and returns the array. See also {{jsxref("Array.prototype.sort()")}}.</dd>
+ <dt>{{jsxref("TypedArray.subarray", "Uint16Array.prototype.subarray()")}}</dt>
+ <dd>Returns a new <code>Uint16Array</code> from the given start and end element index.</dd>
+ <dt>{{jsxref("TypedArray.values", "Uint16Array.prototype.values()")}}</dt>
+ <dd>Returns a new <code>Array Iterator</code> object that contains the values for each index in the array. See also {{jsxref("Array.prototype.values()")}}.</dd>
+ <dt>{{jsxref("TypedArray.toLocaleString", "Uint16Array.prototype.toLocaleString()")}}</dt>
+ <dd>Returns a localized string representing the array and its elements. See also {{jsxref("Array.prototype.toLocaleString()")}}.</dd>
+ <dt>{{jsxref("TypedArray.toString", "Uint16Array.prototype.toString()")}}</dt>
+ <dd>Returns a string representing the array and its elements. See also {{jsxref("Array.prototype.toString()")}}.</dd>
+ <dt>{{jsxref("TypedArray.@@iterator", "Uint16Array.prototype[@@iterator]()")}}</dt>
+ <dd>Returns a new <code>Array Iterator</code> object that contains the values for each index in the array.</dd>
+</dl>
+
+<h2 id="Examples">Examples</h2>
+
+<pre class="brush: js">// From a length
+var uint16 = new Uint16Array(2);
+uint16[0] = 42;
+console.log(uint16[0]); // 42
+console.log(uint16.length); // 2
+console.log(uint16.BYTES_PER_ELEMENT); // 2
+
+// From an array
+var arr = new Uint16Array([21,31]);
+console.log(arr[1]); // 31
+
+// From another TypedArray
+var x = new Uint16Array([21, 31]);
+var y = new Uint16Array(x);
+console.log(y[0]); // 21
+
+// From an ArrayBuffer
+var buffer = new ArrayBuffer(8);
+var z = new Uint16Array(buffer, 0, 4);
+</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td><a href="https://www.khronos.org/registry/typedarray/specs/latest/#7">Typed Array Specification</a></td>
+   <td>Obsolete</td>
+   <td><span><span>Superseded by ECMAScript 6.</span></span></td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#table-45', 'TypedArray constructors')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition in an ECMA standard.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<p>{{ CompatibilityTable() }}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>7.0</td>
+   <td>{{ CompatGeckoDesktop("2") }}</td>
+   <td>10</td>
+   <td>11.6</td>
+   <td>5.1</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Chrome for Android</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>4.0</td>
+   <td>{{ CompatVersionUnknown() }}</td>
+   <td>{{ CompatGeckoMobile("2") }}</td>
+   <td>10</td>
+   <td>11.6</td>
+   <td>4.2</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/JavaScript/Typed_arrays" title="en/JavaScript typed arrays">JavaScript typed arrays</a></li>
+ <li>{{jsxref("ArrayBuffer")}}</li>
+ <li>{{jsxref("DataView")}}</li>
+</ul>