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+---
+title: Uint8ClampedArray
+slug: Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray
+translation_of: Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray
+---
+<div>{{JSRef}}</div>
+
+<p>Типизированный массив<strong><code> Uint8ClampedArray </code></strong>—  это массив,  служащий для хранения 8-битных безнаковых чисел, обрезаемых до диапазона от 0 до 255. Если значение меньше 0, то оно будет приведено к 0 , и к 255, если оно больше 255. Числа с плавающей точкой округляются с помощью математического округления. Массив инициализуруется нулями. После того как значение установлено, Вы можете ссылаться на него с помощью методов объекта или через стандартный синтаксис массивов (то есть, брать значения с помощью квадратных скобок). </p>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox">new Uint8ClampedArray(length);
+new Uint8ClampedArray(typedArray);
+new Uint8ClampedArray(object);
+new Uint8ClampedArray(buffer [, byteOffset [, length]]);</pre>
+
+<p>Для более подробной информации, смотрите <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", "Uint8ClampedArray.BYTES_PER_ELEMENT")}}</dt>
+ <dd>Возвращает размер элемента в байтах. Для Uint8ClampedArray оно равно 1.</dd>
+ <dt>Uint8ClampedArray.length</dt>
+ <dd>Static length property whose value is 3. For the actual length (number of elements), see {{jsxref("TypedArray.prototype.length", "Uint8ClampedArray.prototype.length")}}.</dd>
+ <dt>{{jsxref("TypedArray.name", "Uint8ClampedArray.name")}}</dt>
+ <dd>Returns the string value of the constructor name. In the case of the <code>Uint8ClampedArray</code> type: "Uint8ClampedArray".</dd>
+ <dt>{{jsxref("TypedArray.prototype", "Uint8ClampedArray.prototype")}}</dt>
+ <dd>Prototype for the <em>TypedArray</em> objects.</dd>
+</dl>
+
+<h2 id="Methods">Methods</h2>
+
+<dl>
+ <dt>{{jsxref("TypedArray.from", "Uint8ClampedArray.from()")}}</dt>
+ <dd>Creates a new <code>Uint8ClampedArray</code> from an array-like or iterable object. See also {{jsxref("Array.from()")}}.</dd>
+ <dt>{{jsxref("TypedArray.of", "Uint8ClampedArray.of()")}}</dt>
+ <dd>Creates a new <code>Uint8ClampedArray</code> with a variable number of arguments. See also {{jsxref("Array.of()")}}.</dd>
+</dl>
+
+<h2 id="Uint8ClampedArray_prototype"><code>Uint8ClampedArray</code> prototype</h2>
+
+<p>All <code>Uint8ClampedArray</code> objects inherit from {{jsxref("TypedArray.prototype", "%TypedArray%.prototype")}}.</p>
+
+<h3 id="Properties_2">Properties</h3>
+
+<dl>
+ <dt><code>Uint8ClampedArray.prototype.constructor</code></dt>
+ <dd>Returns the function that created an instance's prototype. This is the <code>Uint8ClampedArray</code> constructor by default.</dd>
+ <dt>{{jsxref("TypedArray.prototype.buffer", "Uint8ClampedArray.prototype.buffer")}} {{readonlyInline}}</dt>
+ <dd>Returns the {{jsxref("ArrayBuffer")}} referenced by the <code>Uint8ClampedArray</code> Fixed at construction time and thus <strong>read only</strong>.</dd>
+ <dt>{{jsxref("TypedArray.prototype.byteLength", "Uint8ClampedArray.prototype.byteLength")}} {{readonlyInline}}</dt>
+ <dd>Returns the length (in bytes) of the <code>Uint8ClampedArray</code> from the start of its {{jsxref("ArrayBuffer")}}. Fixed at construction time and thus <strong>read only.</strong></dd>
+ <dt>{{jsxref("TypedArray.prototype.byteOffset", "Uint8ClampedArray.prototype.byteOffset")}} {{readonlyInline}}</dt>
+ <dd>Returns the offset (in bytes) of the <code>Uint8ClampedArray</code> from the start of its {{jsxref("ArrayBuffer")}}. Fixed at construction time and thus <strong>read only.</strong></dd>
+ <dt>{{jsxref("TypedArray.prototype.length", "Uint8ClampedArray.prototype.length")}} {{readonlyInline}}</dt>
+ <dd>Returns the number of elements hold in the <code>UintClamped8Array</code>. Fixed at construction time and thus <strong>read only.</strong></dd>
+</dl>
+
+<h3 id="Methods_2">Methods</h3>
+
+<dl>
+ <dt>{{jsxref("TypedArray.copyWithin", "Uint8ClampedArray.prototype.copyWithin()")}}</dt>
+ <dd>Copies a sequence of array elements within the array. See also {{jsxref("Array.prototype.copyWithin()")}}.</dd>
+ <dt>{{jsxref("TypedArray.entries", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.prototype.forEach()")}}</dt>
+ <dd>Calls a function for each element in the array. See also {{jsxref("Array.prototype.forEach()")}}.</dd>
+ <dt>{{jsxref("TypedArray.includes", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.prototype.join()")}}</dt>
+ <dd>Joins all elements of an array into a string. See also {{jsxref("Array.prototype.join()")}}.</dd>
+ <dt>{{jsxref("TypedArray.keys", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.prototype.move()")}} {{non-standard_inline}} {{unimplemented_inline}}</dt>
+ <dd>Former non-standard version of {{jsxref("TypedArray.copyWithin", "Uint8ClampedArray.prototype.copyWithin()")}}.</dd>
+ <dt>{{jsxref("TypedArray.reduce", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.prototype.set()")}}</dt>
+ <dd>Stores multiple values in the typed array, reading input values from a specified array.</dd>
+ <dt>{{jsxref("TypedArray.slice", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.prototype.subarray()")}}</dt>
+ <dd>Returns a new <code>Uint8ClampedArray</code> from the given start and end element index.</dd>
+ <dt>{{jsxref("TypedArray.values", "Uint8ClampedArray.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", "Uint8ClampedArray.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", "Uint8ClampedArray.prototype.toString()")}}</dt>
+ <dd>Returns a string representing the array and its elements. See also {{jsxref("Array.prototype.toString()")}}.</dd>
+ <dt>{{jsxref("TypedArray.@@iterator", "Uint8ClampedArray.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 uintc8 = new Uint8ClampedArray(2);
+uintc8[0] = 42;
+uintc8[1] = 1337;
+console.log(uintc8[0]); // 42
+console.log(uintc8[1]); // 255 (clamped)
+console.log(uintc8.length); // 2
+console.log(uintc8.BYTES_PER_ELEMENT); // 1
+
+// From an array
+var arr = new Uint8ClampedArray([21,31]);
+console.log(arr[1]); // 31
+
+// From another TypedArray
+var x = new Uint8ClampedArray([21, 31]);
+var y = new Uint8ClampedArray(x);
+console.log(y[0]); // 21
+
+// From an ArrayBuffer
+var buffer = new ArrayBuffer(8);
+var z = new Uint8ClampedArray(buffer, 1, 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>{{SpecName('Typed Array')}}</td>
+   <td>{{Spec2('Typed Array')}}</td>
+   <td>Superseded by ECMAScript 6.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#table-49', 'TypedArray constructors')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition in an ECMA standard. Specified that <code>new</code> is required.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#table-49', 'TypedArray constructors')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </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>11 (as of <a href="https://support.microsoft.com/en-us/kb/2929437">KB2929437</a>)</td>
+   <td>11.6</td>
+   <td>5.1</td>
+  </tr>
+  <tr>
+   <td><code>new</code> is required</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{ CompatGeckoDesktop(44) }}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</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>{{CompatVersionUnknown}}</td>
+   <td>11.6</td>
+   <td>4.2</td>
+  </tr>
+  <tr>
+   <td><code>new</code> is required</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{ CompatGeckoMobile(44) }}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="Compatibility_notes">Compatibility notes</h2>
+
+<p>Starting with ECMAScript 2015 (ES6), <code>Uint8ClampedArray</code> constructors require to be constructed with a {{jsxref("Operators/new", "new")}} operator. Calling a <code>Uint8ClampedArray</code> constructor as a function without <code>new</code>, will throw a {{jsxref("TypeError")}} from now on.</p>
+
+<pre class="brush: js example-bad">var dv = Uint8ClampedArray([1, 2, 3]);
+// TypeError: calling a builtin Uint8ClampedArray constructor
+// without new is forbidden</pre>
+
+<pre class="brush: js example-good">var dv = new Uint8ClampedArray([1, 2, 3]);</pre>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/JavaScript/Typed_arrays">JavaScript typed arrays</a></li>
+ <li>{{jsxref("ArrayBuffer")}}</li>
+ <li>{{jsxref("DataView")}}</li>
+</ul>