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+---
+title: for each...in
+slug: Web/JavaScript/Reference/Statements/for_each...in
+translation_of: Archive/Web/JavaScript/for_each...in
+---
+<div>{{jsSidebar("Statements")}}</div>
+
+<div class="warning">
+<p>Конструкция <code>for each...in</code> заявлена как "deprecated", как часть стандарта ECMA-357 (<a href="/en-US/docs/Archive/Web/E4X" title="/en-US/docs/E4X">E4X</a>). Поддержка E4X была удалена. Вместо <code>for each...in</code> рассмотрите использование <a href="/en-US/docs/Web/JavaScript/Reference/Statements/for...of">for...of</a>. (Пожалуйста обратите внимание: {{ bug("791343")}}.)<br>
+ <br>
+ <strong>Firefox теперь предупреждает об использовании <code>for each...in</code> и <code>for each...in</code> удаляется из ночных сборок. Пожалуйста, посмотрите <a href="/en-US/docs/Web/JavaScript/Reference/Errors/For-each-in_loops_are_deprecated">Warning: JavaScript 1.6's for-each-in loops are deprecated</a> для помощи в миграции.</strong></p>
+</div>
+
+<p><strong>Выражение</strong> <code><strong>for each...in</strong></code> выполняет перебор свойств указанного объекта. Для каждого свойства выполняется указанный оператор.</p>
+
+<h2 id="Синтаксис">Синтаксис</h2>
+
+<pre class="syntaxbox">for each (<em>variable</em> in <em>object</em>) {
+  <em>statement</em>
+}</pre>
+
+<dl>
+ <dt><code>variable</code></dt>
+ <dd>Variable to iterate over property values, optionally declared with the <code>var</code> keyword. This variable is local to the function, not to the loop.</dd>
+</dl>
+
+<dl>
+ <dt><code>object</code></dt>
+ <dd>Object for which the properties are iterated.</dd>
+</dl>
+
+<dl>
+ <dt><code>statement</code></dt>
+ <dd>A statement to execute for each property. To execute multiple statements within the loop, use a <a href="/en-US/docs/Web/JavaScript/Reference/Statements/block">block</a> statement (<code>{ ... }</code>) to group those statements.</dd>
+</dl>
+
+<h2 id="Description">Description</h2>
+
+<p>Some built-in properties are not iterated over. These include all built-in methods of objects, e.g. <code>String</code>'s <code>indexOf</code> method. However, all user-defined properties are iterated over.</p>
+
+<h2 id="Examples">Examples</h2>
+
+<h3 id="Using_for_each...in">Using <code>for each...in</code></h3>
+
+<p><strong>Warning:</strong> Never use a loop like this on arrays. Only use it on objects. See <a href="/en-US/docs/Web/JavaScript/Reference/Statements/for...in"><code>for...in</code></a> for more details.</p>
+
+<p>The following snippet iterates over an object's properties, calculating their sum:</p>
+
+<pre class="brush:js">var sum = 0;
+var obj = {prop1: 5, prop2: 13, prop3: 8};
+
+for each (var item in obj) {
+  sum += item;
+}
+
+console.log(sum); // logs "26", which is 5+13+8</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<p>Not part of a current ECMA-262 specification. Implemented in JavaScript 1.6 and deprecated.</p>
+
+<h2 id="Браузерная_совместимость">Браузерная совместимость</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>{{CompatNo}}</td>
+   <td>{{CompatGeckoDesktop("1.8")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</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>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoMobile("1.0")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="Firefox_specific_note">Firefox specific note</h2>
+
+<ul>
+ <li><code>for each...in</code> удалён только из Nightly Firefox 53</li>
+</ul>
+
+<h2 id="Смотрите_также">Смотрите также</h2>
+
+<ul>
+ <li><code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/for...in">for...in</a></code> - аналогичный оператор по перебору <em>имён</em> свойств.</li>
+ <li><code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/for...of">for...of</a></code> - аналогичный оператор, перебирающий <em>значения</em> свойств, но может быть использован только для перебираемых (iteratable) типов, so not for generic objects</li>
+ <li><code><a href="/en-US/docs/JavaScript/Reference/Statements/for">for</a></code></li>
+</ul>