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---
title: Promise.prototype.catch()
slug: Web/JavaScript/Reference/Global_Objects/Promise/catch
tags:
- ECMAScript6
- Method
- Promise
- Prototype
- Referensi
translation_of: Web/JavaScript/Reference/Global_Objects/Promise/catch
---
<div>{{JSRef}}</div>
<p>Method <strong>catch()</strong> mengembalikan <code>Promise</code> dan hanya setuju jika kasusnya gagal. Sama halnya dengan memenggil method {{jsxref("Promise.then", "Promise.prototype.then(undefined, onRejected)")}}.</p>
<h2 id="Sintaks">Sintaks</h2>
<pre class="syntaxbox"><var>p.catch(onRejected)</var>;
p.catch(function(reason) {
// rejection
});
</pre>
<h3 id="Parameter">Parameter</h3>
<dl>
<dt>onRejected</dt>
<dd> {{jsxref("Function")}} dipanggil ketika <code>Promise</code> ditolak. Fungsi ini memiliki satu argumen, alasan penolakan.</dd>
</dl>
<h2 id="Deskripsi">Deskripsi</h2>
<p>Method <code>catch</code> sangat berguna untuk menangani error di gabungan promis anda.</p>
<h2 id="Contoh">Contoh</h2>
<h3 id="Penggunaan_method_catch">Penggunaan method <code>catch</code></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!"
}).then(function(){
console.log('after a catch the chain is restored');
}, function () {
console.log('Not fired due to the catch');
});
// The following behaves the same as above
p1.then(function(value) {
console.log(value); // "Success!"
return Promise.reject('oh, no!');
}).catch(function(e) {
console.log(e); // "oh, no!"
}).then(function(){
console.log('after a catch the chain is restored');
}, function () {
console.log('Not fired due to the catch');
});
</pre>
<h3 id="Promis_tidak_dapat_mendeteksi_error_pada_asynchronous_callback">Promis tidak dapat mendeteksi error pada asynchronous callback</h3>
<pre class="brush: js">var p1 = new Promise(function(resolve, reject) {
throw 'Uh-oh!';
});
p1.catch(function(e) {
console.log(e); // "Uh-oh!"
});
var p2 = new Promise(function(resolve, reject) {
setTimeout(function() {
throw 'Uncaught Exception!';
}, 1000);
});
p2.catch(function(e) {
console.log(e); // This is never called
});</pre>
<h2 id="Spesifikasi">Spesifikasi</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Spesifikasi</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>
<tr>
<td>{{SpecName('ESDraft', '#sec-promise.prototype.catch', 'Promise.prototype.catch')}}</td>
<td>{{Spec2('ESDraft')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="Kompabilitas_Browser">Kompabilitas Browser</h2>
<p> </p>
<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
<p>{{Compat("javascript.builtins.Promise.catch")}}</p>
<p> </p>
<h2 id="Lihat_Juga">Lihat Juga</h2>
<ul>
<li>{{jsxref("Promise")}}</li>
<li>{{jsxref("Promise.prototype.then()")}}</li>
</ul>
|
