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+---
+title: Promise.all()
+slug: Web/JavaScript/Reference/Global_Objects/Promise/all
+translation_of: Web/JavaScript/Reference/Global_Objects/Promise/all
+---
+<div>{{JSRef}}</div>
+
+<p>The <strong><code>Promise.all()</code></strong> method returns a single {{jsxref("Promise")}} that resolves when all of the promises passed as an iterable have resolved or when the iterable contains no promises. It rejects with the reason of the first promise that rejects.</p>
+
+<div>{{EmbedInteractiveExample("pages/js/promise-all.html")}}</div>
+
+<p class="hidden">The source for this interactive demo is stored in a GitHub repository. If you'd like to contribute to the interactive demo project, please clone <a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a> and send us a pull request.</p>
+
+<h2 id="Söz_dizimi">Söz dizimi</h2>
+
+<pre class="syntaxbox">Promise.all(<var>iterable</var>);</pre>
+
+<h3 id="Parametreler">Parametreler</h3>
+
+<dl>
+ <dt><code>iterable</code></dt>
+ <dd>{{jsxref("Array")}} yada {{jsxref("String")}} gibi <a href="/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterable_protocol">iterable</a> nesnesi.</dd>
+</dl>
+
+<h3 id="Dönen_değer">Dönen değer</h3>
+
+<ul>
+ <li>An <strong>already resolved</strong> {{jsxref("Promise")}} if the <var>iterable</var> passed is empty.</li>
+ <li>An <strong>asynchronously resolved</strong> {{jsxref("Promise")}} if the <var>iterable</var> passed contains no promises. Note, Google Chrome 58 returns an <strong>already resolved</strong> promise in this case.</li>
+ <li>A <strong>pending</strong> {{jsxref("Promise")}} in all other cases. This returned promise is then resolved/rejected <strong>asynchronously</strong> (as soon as the stack is empty) when all the promises in the given <var>iterable</var> have resolved, or if any of the promises reject. See the example about "Asynchronicity or synchronicity of Promise.all" below. Returned values will be in order of the Promises passed, regardless of completion order.</li>
+</ul>
+
+<h2 id="Açıklama">Açıklama</h2>
+
+<p>This method can be useful for aggregating the results of multiple promises.</p>
+
+<h3 id="Fulfillment">Fulfillment</h3>
+
+<p>The returned promise is fulfilled with an array containing <strong>all </strong>the values of the <var>iterable</var> passed as argument (also non-promise values).</p>
+
+<ul>
+ <li>If an empty <var>iterable</var> is passed, then this method returns (synchronously) an already resolved promise.</li>
+ <li>If all of the passed-in promises fulfill, or are not promises, the promise returned by <code>Promise.all</code> is fulfilled asynchronously.</li>
+</ul>
+
+<h3 id="Rejection">Rejection</h3>
+
+<p>If any of the passed-in promises reject, <code>Promise.all</code> asynchronously rejects with the value of the promise that rejected, whether or not the other promises have resolved.</p>
+
+<h2 id="Örnekler">Örnekler</h2>
+
+<h3 id="Promise.all_Kullanımı"><code>Promise.all</code> Kullanımı</h3>
+
+<p><code>Promise.all</code> tüm işlemler yerine getirilene kadar bekler (yada ilk reddedilmeye kadar).</p>
+
+<pre class="brush: js">var p1 = Promise.resolve(3);
+var p2 = 1337;
+var p3 = new Promise((resolve, reject) =&gt; {
+  setTimeout(() =&gt; {
+    resolve("foo");
+  }, 100);
+});
+
+Promise.all([p1, p2, p3]).then(values =&gt; {
+  console.log(values); // [3, 1337, "foo"]
+});</pre>
+
+<p>If the <var>iterable</var> contains non-promise values, they will be ignored, but still counted in the returned promise array value (if the promise is fulfilled):</p>
+
+<pre class="brush: js">// this will be counted as if the iterable passed is empty, so it gets fulfilled
+var p = Promise.all([1,2,3]);
+// this will be counted as if the iterable passed contains only the resolved promise with value "444", so it gets fulfilled
+var p2 = Promise.all([1,2,3, Promise.resolve(444)]);
+// this will be counted as if the iterable passed contains only the rejected promise with value "555", so it gets rejected
+var p3 = Promise.all([1,2,3, Promise.reject(555)]);
+
+// using setTimeout we can execute code after the stack is empty
+setTimeout(function() {
+    console.log(p);
+    console.log(p2);
+    console.log(p3);
+});
+
+// logs
+// Promise { &lt;state&gt;: "fulfilled", &lt;value&gt;: Array[3] }
+// Promise { &lt;state&gt;: "fulfilled", &lt;value&gt;: Array[4] }
+// Promise { &lt;state&gt;: "rejected", &lt;reason&gt;: 555 }</pre>
+
+<h3 id="Asynchronicity_or_synchronicity_of_Promise.all">Asynchronicity or synchronicity of <code>Promise.all</code></h3>
+
+<p>This following example demonstrates the asynchronicity (or synchronicity, if the <var>iterable</var> passed is empty) of <code>Promise.all</code>:</p>
+
+<pre class="brush: js">// we are passing as argument an array of promises that are already resolved,
+// to trigger Promise.all as soon as possible
+var resolvedPromisesArray = [Promise.resolve(33), Promise.resolve(44)];
+
+var p = Promise.all(resolvedPromisesArray);
+// immediately logging the value of p
+console.log(p);
+
+// using setTimeout we can execute code after the stack is empty
+setTimeout(function() {
+    console.log('the stack is now empty');
+    console.log(p);
+});
+
+// logs, in order:
+// Promise { &lt;state&gt;: "pending" }
+// the stack is now empty
+// Promise { &lt;state&gt;: "fulfilled", &lt;value&gt;: Array[2] }
+</pre>
+
+<p>The same thing happens if <code>Promise.all</code> rejects:</p>
+
+<pre class="brush: js">var mixedPromisesArray = [Promise.resolve(33), Promise.reject(44)];
+var p = Promise.all(mixedPromisesArray);
+console.log(p);
+setTimeout(function() {
+    console.log('the stack is now empty');
+    console.log(p);
+});
+
+// logs
+// Promise { &lt;state&gt;: "pending" }
+// the stack is now empty
+// Promise { &lt;state&gt;: "rejected", &lt;reason&gt;: 44 }
+</pre>
+
+<p>But, <code>Promise.all</code> resolves synchronously <strong>if and only if</strong> the <var>iterable</var> passed is empty:</p>
+
+<pre class="brush: js">var p = Promise.all([]); // will be immediately resolved
+var p2 = Promise.all([1337, "hi"]); // non-promise values will be ignored, but the evaluation will be done asynchronously
+console.log(p);
+console.log(p2)
+setTimeout(function() {
+    console.log('the stack is now empty');
+    console.log(p2);
+});
+
+// logs
+// Promise { &lt;state&gt;: "fulfilled", &lt;value&gt;: Array[0] }
+// Promise { &lt;state&gt;: "pending" }
+// the stack is now empty
+// Promise { &lt;state&gt;: "fulfilled", &lt;value&gt;: Array[2] }
+</pre>
+
+<h3 id="Promise.all_fail-fast_behaviour"><code>Promise.all</code> fail-fast behaviour</h3>
+
+<p><code>Promise.all</code> is rejected if any of the elements are rejected. For example, if you pass in four promises that resolve after a timeout and one promise that rejects immediately, then <code>Promise.all</code> will reject immediately.</p>
+
+<pre class="brush: js">var p1 = new Promise((resolve, reject) =&gt; {
+  setTimeout(() =&gt; resolve('one'), 1000);
+});
+var p2 = new Promise((resolve, reject) =&gt; {
+  setTimeout(() =&gt; resolve('two'), 2000);
+});
+var p3 = new Promise((resolve, reject) =&gt; {
+  setTimeout(() =&gt; resolve('three'), 3000);
+});
+var p4 = new Promise((resolve, reject) =&gt; {
+  setTimeout(() =&gt; resolve('four'), 4000);
+});
+var p5 = new Promise((resolve, reject) =&gt; {
+  reject(new Error('reject'));
+});
+
+
+// Using .catch:
+Promise.all([p1, p2, p3, p4, p5])
+.then(values =&gt; {
+  console.log(values);
+})
+.catch(error =&gt; {
+  console.log(error.message)
+});
+
+//From console:
+//"reject"
+
+</pre>
+
+<p>It is possible to change this behaviour by handling possible rejections:</p>
+
+<pre class="brush: js">var p1 = new Promise((resolve, reject) =&gt; {
+  setTimeout(() =&gt; resolve('p1_delayed_resolvement'), 1000);
+});
+
+var p2 = new Promise((resolve, reject) =&gt; {
+  reject(new Error('p2_immediate_rejection'));
+});
+
+Promise.all([
+  p1.catch(error =&gt; { return error }),
+  p2.catch(error =&gt; { return error }),
+]).then(values =&gt; {
+  console.log(values[0]) // "p1_delayed_resolvement"
+  console.log(values[1]) // "Error: p2_immediate_rejection"
+})
+</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('ES2015', '#sec-promise.all', 'Promise.all')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition in an ECMA standard.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-promise.all', 'Promise.all')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<p class="hidden">To contribute to this compatibility data, please write a pull request against this repository: <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a>.</p>
+
+<p>{{Compat("javascript.builtins.Promise.all")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>{{jsxref("Promise")}}</li>
+ <li>{{jsxref("Promise.race()")}}</li>
+</ul>