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+---
+title: handler.apply()
+slug: Web/JavaScript/Reference/Global_Objects/Proxy/handler/apply
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - Proxy
+  - metodo
+translation_of: Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/apply
+---
+<div>{{JSRef}}</div>
+
+<p>Il metodo <strong><code>handler.apply()</code></strong> costituisce una trap per una chiamata a funzione.</p>
+
+<div>{{EmbedInteractiveExample("pages/js/proxyhandler-apply.html", "taller")}}</div>
+
+<p class="hidden">Il sorgente di questo esempio interattivo è memorizzato in una repository GitHub. Qualora volessi contribuire al progetto degli esempi interattivi, puoi farlo clonando <a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a> e inviandoci una pull request.</p>
+
+<h2 id="Sintassi">Sintassi</h2>
+
+<pre class="brush: js">var p = new Proxy(target, {
+  apply: function(target, thisArg, argumentsList) {
+  }
+});
+</pre>
+
+<h3 id="Parametri">Parametri</h3>
+
+<p>I seguenti parametri vengono passati al metodo <code>apply</code>. <code>this</code> è legato all'handler.</p>
+
+<dl>
+ <dt><code>target</code></dt>
+ <dd>L'oggetto target.</dd>
+ <dt><code>thisArg</code></dt>
+ <dd>Il valore di <code>this</code> relativo alla chiamata.</dd>
+ <dt><code>argumentsList</code></dt>
+ <dd>La lista degli argomenti della chiamata.</dd>
+</dl>
+
+<h3 id="Valore_di_ritorno">Valore di ritorno</h3>
+
+<p>Il metodo <code>apply</code> può restituire qualsiasi valore.</p>
+
+<h2 id="Descrizione">Descrizione</h2>
+
+<p>Il metodo <code><strong>handler.apply</strong></code> è una trap per le chiamate a funzione.</p>
+
+<h3 id="Operazioni_intercettate">Operazioni intercettate</h3>
+
+<p>Questa trap può intercettare le seguenti operazioni:</p>
+
+<ul>
+ <li><code>proxy(...args)</code></li>
+ <li>{{jsxref("Function.prototype.apply()")}} e {{jsxref("Function.prototype.call()")}}</li>
+ <li>{{jsxref("Reflect.apply()")}}</li>
+</ul>
+
+<h3 id="Invarianti">Invarianti</h3>
+
+<p>Se le seguenti invarianti non sono rispettate il proxy emetterà un TypeError:</p>
+
+<ul>
+ <li>Lo stesso <code>target</code> deve essere un oggetto richiamabile, cioè deve essere un oggetto funzione.</li>
+</ul>
+
+<h2 id="Esempi">Esempi</h2>
+
+<p>Il codice seguente intercetta una chiamata a funzione.</p>
+
+<pre class="brush: js">var p = new Proxy(function() {}, {
+  apply: function(target, thisArg, argumentsList) {
+    console.log('chiamato con: ' + argumentsList.join(', '));
+    return argumentsList[0] + argumentsList[1] + argumentsList[2];
+  }
+});
+
+console.log(p(1, 2, 3)); // "chiamato con: 1, 2, 3"
+                         // 6
+</pre>
+
+<h2 id="Specifiche">Specifiche</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specifica</th>
+   <th scope="col">Stato</th>
+   <th scope="col">Commenti</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES2015', '#sec-proxy-object-internal-methods-and-internal-slots-call-thisargument-argumentslist', '[[Call]]')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-proxy-object-internal-methods-and-internal-slots-call-thisargument-argumentslist', '[[Call]]')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilità_browser">Compatibilità browser</h2>
+
+<div>
+<div class="hidden">La tabella di compatibilità su questa pagina è generata a partire da dati strutturati. Se vuoi contribuire ai dati, fai un check out da <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> e mandaci una pull request.</div>
+
+<p>{{Compat("javascript.builtins.Proxy.handler.apply")}}</p>
+</div>
+
+<h2 id="Vedi_anche">Vedi anche</h2>
+
+<ul>
+ <li>{{jsxref("Proxy")}}</li>
+ <li>{{jsxref("Proxy.handler", "handler")}}</li>
+ <li>{{jsxref("Function.prototype.apply")}}</li>
+ <li>{{jsxref("Function.prototype.call")}}</li>
+ <li>{{jsxref("Reflect.apply()")}}</li>
+</ul>
diff --git a/files/it/web/javascript/reference/global_objects/proxy/handler/index.html b/files/it/web/javascript/reference/global_objects/proxy/handler/index.html
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+---
+title: Proxy handler
+slug: Web/JavaScript/Reference/Global_Objects/Proxy/handler
+tags:
+  - ECMAScript 2015
+  - JavaScript
+  - NeedsTranslation
+  - Proxy
+  - TopicStub
+translation_of: Web/JavaScript/Reference/Global_Objects/Proxy/Proxy
+---
+<div>{{JSRef}}</div>
+
+<p>The proxy's handler object is a placeholder object which contains traps for {{jsxref("Proxy", "proxies", "", 1)}}.</p>
+
+<h2 id="Methods">Methods</h2>
+
+<p>All traps are optional. If a trap has not been defined, the default behavior is to forward the operation to the target.</p>
+
+<dl>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/getPrototypeOf", "handler.getPrototypeOf()")}}</dt>
+ <dd>A trap for {{jsxref("Object.getPrototypeOf")}}.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/setPrototypeOf", "handler.setPrototypeOf()")}}</dt>
+ <dd>A trap for {{jsxref("Object.setPrototypeOf")}}.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/isExtensible", "handler.isExtensible()")}}</dt>
+ <dd>A trap for {{jsxref("Object.isExtensible")}}.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/preventExtensions", "handler.preventExtensions()")}}</dt>
+ <dd>A trap for {{jsxref("Object.preventExtensions")}}.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/getOwnPropertyDescriptor", "handler.getOwnPropertyDescriptor()")}}</dt>
+ <dd>A trap for {{jsxref("Object.getOwnPropertyDescriptor")}}.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/defineProperty", "handler.defineProperty()")}}</dt>
+ <dd>A trap for {{jsxref("Object.defineProperty")}}.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/has", "handler.has()")}}</dt>
+ <dd>A trap for the {{jsxref("Operators/in", "in")}} operator.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/get", "handler.get()")}}</dt>
+ <dd>A trap for getting property values.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/set", "handler.set()")}}</dt>
+ <dd>A trap for setting property values.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/deleteProperty", "handler.deleteProperty()")}}</dt>
+ <dd>A trap for the {{jsxref("Operators/delete", "delete")}} operator.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/ownKeys", "handler.ownKeys()")}}</dt>
+ <dd>A trap for {{jsxref("Object.getOwnPropertyNames")}} and {{jsxref("Object.getOwnPropertySymbols")}}.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/apply", "handler.apply()")}}</dt>
+ <dd>A trap for a function call.</dd>
+ <dt>{{jsxref("Global_Objects/Proxy/handler/construct", "handler.construct()")}}</dt>
+ <dd>A trap for the {{jsxref("Operators/new", "new")}} operator.</dd>
+</dl>
+
+<p>Some non-standard traps are <a href="/en-US/docs/Web/JavaScript/Reference/Deprecated_and_obsolete_features#Proxy">obsolete and have been removed</a>.</p>
+
+<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('ES2015', '#sec-proxy-object-internal-methods-and-internal-slots', 'Proxy Object Internal Methods and Internal Slots')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-proxy-object-internal-methods-and-internal-slots', 'Proxy Object Internal Methods and Internal Slots')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td>The <code>enumerate</code> handler has been removed.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("javascript.builtins.Proxy.handler")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>{{jsxref("Proxy")}}</li>
+</ul>