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+---
+title: Promise.prototype.catch()
+slug: Web/JavaScript/Reference/Global_Objects/Promise/catch
+translation_of: Web/JavaScript/Reference/Global_Objects/Promise/catch
+---
+<div>{{JSRef}}</div>
+
+<p>Il metodo <strong>catch()</strong> restituisce una <code>Promise</code> e si occusa esclusivamente nei casi respinti. Si comporta come una chiamata {{jsxref("Promise.then", "Promise.prototype.then(undefined, onRejected)")}}.</p>
+
+<p> </p>
+
+<h2 id="Sintassi">Sintassi</h2>
+
+<pre class="syntaxbox"><var>p.catch(onRejected)</var>;
+
+p.catch(function(reason) {
+   // rejection
+});
+</pre>
+
+<h3 id="Parametri">Parametri</h3>
+
+<dl>
+ <dt>onRejected</dt>
+ <dd>Una {{jsxref("Function")}} chiamata quando la <code>Promise</code> viene respinta. Questa funzione richiede un parametro, la motivazione della respinta.</dd>
+</dl>
+
+<h2 id="Descrizione">Descrizione</h2>
+
+<p>Il metodo <code>catch</code> può essere utile per gestire errori nella composizione delle promise.</p>
+
+<h2 id="Esempi">Esempi</h2>
+
+<h3 id="Uso_del_metodo_catch">Uso del metodo catch</h3>
+
+<pre class="brush: js">var p1 = new Promise(function(resolve, reject) {
+  resolve("Success");
+});
+
+p1.then(function(value) {
+  console.log(value); // "Success!"
+  throw "oh, no!";
+}).catch(function(e) {
+  console.log(e); // "oh, no!"
+});
+</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('ES6', '#sec-promise.prototype.catch', 'Promise.prototype.catch')}}</td>
+   <td>{{Spec2('ES6')}}</td>
+   <td>Initial definition in an ECMA standard.</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>32</td>
+   <td>{{CompatGeckoDesktop(29.0)}} [1]</td>
+   <td>{{CompatNo}}</td>
+   <td>19</td>
+   <td>7.1</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoMobile(29.0)}} [1]</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>8</td>
+   <td>32</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<p>[1] Gecko 24 has an experimental implementation of <code>Promise</code>, under the initial name of <code>Future</code>. It got renamed to its final name in Gecko 25, but disabled by default behind the flag <code>dom.promise.enabled</code>. <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=918806">Bug 918806</a> enabled Promises by default in Gecko 29.</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>{{jsxref("Promise")}}</li>
+ <li>{{jsxref("Promise.prototype.then()")}}</li>
+</ul>