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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:41:15 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:41:15 -0500 |
commit | 4b1a9203c547c019fc5398082ae19a3f3d4c3efe (patch) | |
tree | d4a40e13ceeb9f85479605110a76e7a4d5f3b56b /files/de/web/javascript/reference/global_objects/map/keys | |
parent | 33058f2b292b3a581333bdfb21b8f671898c5060 (diff) | |
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diff --git a/files/de/web/javascript/reference/global_objects/map/keys/index.html b/files/de/web/javascript/reference/global_objects/map/keys/index.html new file mode 100644 index 0000000000..0f8187752b --- /dev/null +++ b/files/de/web/javascript/reference/global_objects/map/keys/index.html @@ -0,0 +1,69 @@ +--- +title: Map.prototype.keys() +slug: Web/JavaScript/Reference/Global_Objects/Map/keys +tags: + - ECMAScript 2015 + - Iterator + - JavaScript + - Map + - Method + - Prototype +translation_of: Web/JavaScript/Reference/Global_Objects/Map/keys +--- +<div>{{JSRef}}</div> + +<p>Die Methode <code><strong>keys()</strong></code> gibt ein neues <code><strong><a href="/de/docs/Web/JavaScript/Guide/Iterators_and_Generators">Iterator</a></strong></code> Objekt zurück, das die Schlüssel für alle Elemente des <code>Map</code> Objekts in der Reihenfolge des Einfügens enthält.</p> + +<div>{{EmbedInteractiveExample("pages/js/map-prototype-keys.html")}}</div> + + + +<h2 id="Syntax">Syntax</h2> + +<pre class="syntaxbox"><code><em>myMap</em>.keys()</code></pre> + +<h3 id="Rückgabewert">Rückgabewert</h3> + +<p>Ein neues {{jsxref("Map")}} Iterator-Objekt.</p> + +<h2 id="Beispiele">Beispiele</h2> + +<h3 id="Verwendung_von_keys">Verwendung von <code>keys()</code></h3> + +<pre class="brush:js">var myMap = new Map(); +myMap.set('0', 'foo'); +myMap.set(1, 'bar'); +myMap.set({}, 'baz'); + +var mapIter = myMap.keys(); + +console.log(mapIter.next().value); // "0" +console.log(mapIter.next().value); // 1 +console.log(mapIter.next().value); // Object +</pre> + +<h2 id="Spezifikationen">Spezifikationen</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Spezifikation</th> + </tr> + <tr> + <td>{{SpecName('ESDraft', '#sec-map.prototype.keys', 'Map.prototype.keys')}}</td> + </tr> + </tbody> +</table> + +<h2 id="Browserkompatibilität">Browserkompatibilität</h2> + + + +<p>{{Compat("javascript.builtins.Map.keys")}}</p> + +<h2 id="Siehe_auch">Siehe auch</h2> + +<ul> + <li>{{jsxref("Map.prototype.entries()")}}</li> + <li>{{jsxref("Map.prototype.values()")}}</li> +</ul> |