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diff --git a/files/de/web/javascript/reference/deprecated_and_obsolete_features/index.html b/files/de/web/javascript/reference/deprecated_and_obsolete_features/index.html
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+---
+title: Veraltete und abgeschaffte Features
+slug: Web/JavaScript/Reference/Veraltete_und_abgeschaffte_Features
+translation_of: Web/JavaScript/Reference/Deprecated_and_obsolete_features
+---
+<div>{{JsSidebar("More")}}</div>
+
+<p>Diese Seite listet die Features JavaScriptes auf, die veraltet sind( das bedeutet, dass noch benutzbar, aber Entfernung geplant) und abgeschafft sind( das bedeutet: nicht länger benutzbar).</p>
+
+<h2 id="Veraltete_Features">Veraltete Features</h2>
+
+<p>Diese veralteten Features können noch benutzt werden, aber sollten mit Vorsicht benutzt werden, da erwartet wird, dass sie in Futura endgültig abgeschafft werden. Man sollte daran arbeiten, sie von seinem Code zu entfernen.</p>
+
+<h3 id="RegExp-Eigenschaften">RegExp-Eigenschaften</h3>
+
+<p>The following properties are deprecated. This does not affect their use in {{jsxref("String.replace", "replacement strings", "", 1)}}:</p>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th>Property</th>
+   <th>Description</th>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.n", "$1-$9")}}</td>
+   <td>
+    <p>Parenthesized substring matches, if any.<br>
+     <strong>Warning:</strong> Using these properties can result in problems, since browser extensions can modify them. Avoid them!</p>
+   </td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.input", "$_")}}</td>
+   <td>See <code>input</code>.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.multiline", "$*")}}</td>
+   <td>See <code>multiline</code>.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.lastMatch", "$&amp;")}}</td>
+   <td>See <code>lastMatch</code>.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.lastParen", "$+")}}</td>
+   <td>See <code>lastParen</code>.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.leftContext", "$`")}}</td>
+   <td>See <code>leftContext</code>.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.rightContext", "$'")}}</td>
+   <td>See <code>rightContext</code>.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.input", "input")}}</td>
+   <td>The string against which a regular expression is matched.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.lastMatch", "lastMatch")}}</td>
+   <td>The last matched characters.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.lastParen", "lastParen")}}</td>
+   <td>The last parenthesized substring match, if any.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.leftContext", "leftContext")}}</td>
+   <td>The substring preceding the most recent match.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.rightContext", "rightContext")}}</td>
+   <td>The substring following the most recent match.</td>
+  </tr>
+ </tbody>
+</table>
+
+<p>The following are now properties of <code>RegExp</code> instances, no longer of the <code>RegExp</code> object:</p>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th>Property</th>
+   <th>Description</th>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.global", "global")}}</td>
+   <td>Whether or not to test the regular expression against all possible matches in a string, or only against the first.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.ignoreCase", "ignoreCase")}}</td>
+   <td>Whether or not to ignore case while attempting a match in a string.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.lastIndex", "lastIndex")}}</td>
+   <td>The index at which to start the next match.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.multiline", "multiline")}}</td>
+   <td>Whether or not to search in strings across multiple lines.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("RegExp.source", "source")}}</td>
+   <td>The text of the pattern.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h3 id="RegExp_methods">RegExp methods</h3>
+
+<ul>
+ <li>The {{jsxref("RegExp.compile", "compile()")}} method is deprecated.</li>
+ <li>The <code>valueOf</code> method is no longer specialized for <code>RegExp</code>. Use {{jsxref("Object.valueOf()")}}.</li>
+</ul>
+
+<h3 id="Function_properties">Function properties</h3>
+
+<ul>
+ <li>The {{jsxref("Global_Objects/Function/caller", "caller")}} and {{jsxref("Global_Objects/Function/arguments", "arguments")}} properties are deprecated, because they leak the function caller. Instead of the arguments property, you should use the {{jsxref("Functions/arguments", "arguments")}} object inside function closures.</li>
+</ul>
+
+<h3 id="Legacy_generator">Legacy generator</h3>
+
+<ul>
+ <li>{{jsxref("Statements/Legacy_generator_function", "Legacy generator function statement")}} and {{jsxref("Operators/Legacy_generator_function", "Legacy generator function expression")}} are deprecated. Use {{jsxref("Statements/function*", "function* statement")}} and {{jsxref("Operators/function*", "function* expression")}} instead.</li>
+ <li>{{jsxref("Operators/Array_comprehensions", "JS1.7/JS1.8 Array comprehension", "#Differences_to_the_older_JS1.7.2FJS1.8_comprehensions")}} and {{jsxref("Operators/Generator_comprehensions", "JS1.7/JS1.8 Generator comprehension", "#Differences_to_the_older_JS1.7.2FJS1.8_comprehensions")}} are deprecated.</li>
+</ul>
+
+<h3 id="Iterator">Iterator</h3>
+
+<ul>
+ <li>{{jsxref("Global_Objects/StopIteration", "StopIteration")}} is deprecated.</li>
+ <li>{{jsxref("Global_Objects/Iterator", "Iterator")}} is deprecated.</li>
+</ul>
+
+<h3 id="Object_methods">Object methods</h3>
+
+<ul>
+ <li>{{jsxref("Object.watch", "watch")}} and {{jsxref("Object.unwatch", "unwatch")}} are deprecated. Use {{jsxref("Proxy")}} instead.</li>
+ <li><code>__iterator__</code> is deprecated.</li>
+ <li>{{jsxref("Object.noSuchMethod", "__noSuchMethod__")}} is deprecated. Use {{jsxref("Proxy")}} instead.</li>
+</ul>
+
+<h3 id="Date_methods">Date methods</h3>
+
+<ul>
+ <li>{{jsxref("Global_Objects/Date/getYear", "getYear")}} and {{jsxref("Global_Objects/Date/setYear", "setYear")}} are affected by the Year-2000-Problem and have been subsumed by {{jsxref("Global_Objects/Date/getFullYear", "getFullYear")}} and {{jsxref("Global_Objects/Date/setFullYear", "setFullYear")}}.</li>
+ <li>You should use {{jsxref("Global_Objects/Date/toISOString", "toISOString")}} instead of the deprecated {{jsxref("Global_Objects/Date/toGMTString", "toGMTString")}} method in new code.</li>
+ <li>{{jsxref("Global_Objects/Date/toLocaleFormat", "toLocaleFormat")}} is deprecated.</li>
+</ul>
+
+<h3 id="Functions">Functions</h3>
+
+<ul>
+ <li>{{jsxref("Operators/Expression_closures", "Expression closures", "", 1)}} are deprecated. Use regular {{jsxref("Operators/function", "functions")}} or {{jsxref("Functions/Arrow_functions", "arrow functions", "", 1)}} instead.</li>
+</ul>
+
+<h3 id="Proxy">Proxy</h3>
+
+<ul>
+ <li><a href="/en-US/docs/Archive/Web/Old_Proxy_API">Proxy.create</a> and <a href="/en-US/docs/Archive/Web/Old_Proxy_API">Proxy.createFunction</a> are deprecated. Use {{jsxref("Proxy")}} instead.</li>
+ <li>The following traps are obsolete:
+  <ul>
+   <li><code>hasOwn</code> ({{bug(980565)}}, Firefox 33).</li>
+   <li><code>getEnumerablePropertyKeys</code> ({{bug(783829)}}, Firefox 37)</li>
+   <li><code>getOwnPropertyNames</code> ({{bug(1007334)}}, Firefox 33)</li>
+   <li><code>keys</code> ({{bug(1007334)}}, Firefox 33)</li>
+  </ul>
+ </li>
+</ul>
+
+<h3 id="let">let</h3>
+
+<ul>
+ <li>{{jsxref("Statements/let", "let blocks", "#let_block")}} and {{jsxref("Statements/let", "let expressions", "#let_expressions")}} are deprecated.</li>
+</ul>
+
+<h3 id="Escape_sequences">Escape sequences</h3>
+
+<ul>
+ <li>Octal escape sequences (\ followed by one, two, or three octal digits) are deprecated in string and regular expression literals.</li>
+ <li>The {{jsxref("Global_Objects/escape", "escape")}} and {{jsxref("Global_Objects/unescape", "unescape")}} functions are deprecated. Use {{jsxref("Global_Objects/encodeURI", "encodeURI")}}, {{jsxref("Global_Objects/encodeURIComponent", "encodeURIComponent")}}, {{jsxref("Global_Objects/decodeURI", "decodeURI")}} or {{jsxref("Global_Objects/decodeURIComponent", "decodeURIComponent")}} to encode and decode escape sequences for special characters.</li>
+</ul>
+
+<h3 id="String_methods">String methods</h3>
+
+<ul>
+ <li><a href="https://developer.mozilla.org/en-US/docs/tag/HTML%20wrapper%20methods">HTML wrapper methods</a> like {{jsxref("String.prototype.fontsize")}} and {{jsxref("String.prototype.big")}}.</li>
+ <li>{{jsxref("String.prototype.quote")}} is removed from Firefox 37.</li>
+ <li>non standard <code>flags</code> parameter in {{jsxref("String.prototype.search")}}, {{jsxref("String.prototype.match")}}, and {{jsxref("String.prototype.replace")}} are deprecated.</li>
+</ul>
+
+<h2 id="Obsolete_features">Obsolete features</h2>
+
+<p>These obsolete features have been entirely removed from JavaScript and can no longer be used as of the indicated version of JavaScript.</p>
+
+<h3 id="Object">Object</h3>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th>Property</th>
+   <th>Description</th>
+  </tr>
+  <tr>
+   <td>{{jsxref("Global_Objects/Object/count", "__count__")}}</td>
+   <td>Returns the number of enumerable properties directly on a user-defined object.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Global_Objects/Object/Parent", "__parent__")}}</td>
+   <td>Points to an object's context.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Global_Objects/Object/eval", "Object.prototype.eval()")}}</td>
+   <td>Evaluates a string of JavaScript code in the context of the specified object.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Object.observe()")}}</td>
+   <td>Asynchronously observing the changes to an object.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Object.unobserve()")}}</td>
+   <td>Remove observers.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Object.getNotifier()")}}</td>
+   <td>Creates an object that allows to synthetically trigger a change.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h3 id="Function">Function</h3>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th>Property</th>
+   <th>Description</th>
+  </tr>
+  <tr>
+   <td>{{jsxref("Global_Objects/Function/arity", "arity")}}</td>
+   <td>Number of formal arguments.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h3 id="Array">Array</h3>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <td>Property</td>
+   <td>Description</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Array.observe()")}}</td>
+   <td>Asynchronously observing changes to Arrays.</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Array.unobserve()")}}</td>
+   <td>Remove observers.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h3 id="Number">Number</h3>
+
+<ul>
+ <li>{{jsxref("Number.toInteger()")}}</li>
+</ul>
+
+<h3 id="ParallelArray">ParallelArray</h3>
+
+<ul>
+ <li>{{jsxref("ParallelArray")}}</li>
+</ul>
+
+<h3 id="Statements">Statements</h3>
+
+<ul>
+ <li>{{jsxref("Statements/for_each...in", "for each...in")}} is deprecated. Use {{jsxref("Statements/for...of", "for...of")}} instead.</li>
+ <li>Destructuring {{jsxref("Statements/for...in", "for...in")}} is deprecated. Use {{jsxref("Statements/for...of", "for...of")}} instead.</li>
+</ul>
+
+<h3 id="E4X">E4X</h3>
+
+<p>See <a href="/en-US/docs/Archive/Web/E4X">E4X</a> for more information.</p>
+
+<h3 id="Sharp_variables">Sharp variables</h3>
+
+<p>See <a href="/en-US/docs/Archive/Web/Sharp_variables_in_JavaScript">Sharp variables in JavaScript</a> for more information.</p>
diff --git a/files/de/web/javascript/reference/deprecated_and_obsolete_features/the_legacy_iterator_protocol/index.html b/files/de/web/javascript/reference/deprecated_and_obsolete_features/the_legacy_iterator_protocol/index.html
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+---
+title: The legacy Iterator protocol
+slug: >-
+  Web/JavaScript/Reference/Veraltete_und_abgeschaffte_Features/The_legacy_Iterator_protocol
+tags:
+  - ES2015
+  - JavaScript
+  - Obsolet
+  - next()
+  - veralteter Iterator
+translation_of: >-
+  Web/JavaScript/Reference/Deprecated_and_obsolete_features/The_legacy_Iterator_protocol
+---
+<div>{{jsSidebar("More")}}</div>
+
+<div class="warning"><strong>Kein Standard.</strong> Das veraltete Iterator-Protokoll war ein SpiderMonkey-spezifisches Feature, welches in Firefox 58 entfernt wurde. Als Alternative werden <a href="/en-US/docs/Web/JavaScript/Reference/Statements/for...of">for..of</a> Schleifen und das <a href="/en-US/docs/Web/JavaScript/Guide/The_Iterator_protocol">iterator protocol</a> empfohlen.</div>
+
+<h2 id="Das_veraltete_Iterator-Protokoll">Das veraltete Iterator-Protokoll</h2>
+
+<p>Vor Version 26 implementierte Firefox ein anderes Iterator-Protokoll, welches dem <a href="/en-US/docs/Web/JavaScript/Guide/The_Iterator_protocol">ES2015 Iterator protocol</a> Standard entspricht.</p>
+
+<p>Ein Objekt ist ein veralteter Iterator, wenn es eine <code>next()</code>  Methode mit den folgenden Semantiken implementiert, welches zum Ende der Iteration {{jsxref("Global_Objects/StopIteration", "StopIteration")}} wirft.</p>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Property</th>
+   <th scope="col">Value</th>
+  </tr>
+  <tr>
+   <td><code>next</code></td>
+   <td>Eine Funktion ohne Argumente, welche einen Wert zurückgibt.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h3 id="Unterschied_zwischen_dem_veralteten_und_dem_ES2015_Iterator-Protokoll">Unterschied zwischen dem veralteten und dem ES2015 Iterator-Protokoll</h3>
+
+<ul>
+ <li>Der Wert wurde direkt von der <code>next</code> Methode zurückgegeben, statt der Wert der <code>value</code> Eigenschaft eines Platzhalter-Objekts zu sein.</li>
+ <li>Das Ende der Iteration wurde durch das Werfen eines {{jsxref("Global_Objects/StopIteration", "StopIteration")}} Objekts ausgedrückt.</li>
+</ul>
+
+<h3 id="Einfaches_Beispiel_mit_dem_alten_Protokoll">Einfaches Beispiel mit dem alten Protokoll</h3>
+
+<pre class="brush: js">function kreiereIterator(array){
+    var nextIndex = 0;
+
+    return {
+       next: function(){
+           if(nextIndex &lt; array.length){
+               return array[nextIndex++];
+           else
+               throw new StopIteration();
+       }
+    }
+}
+
+var it = kreiereIterator(['yo', 'ya']);
+
+console.log(it.next()); // 'yo'
+console.log(it.next()); // 'ya'
+try{
+    console.log(it.next());
+}
+catch(e){
+    if(e instanceof StopIteration){
+         // Iteration beendet.
+    }
+}
+</pre>
+
+<h2 id="Siehe_auch">Siehe auch</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators">Iteratoren und Generatoren</a></li>
+ <li>Mehr <a href="/en-US/docs/Web/JavaScript/Reference/Deprecated_and_obsolete_features">veraltete und obsolete Features</a></li>
+</ul>