From 074785cea106179cb3305637055ab0a009ca74f2 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:42:52 -0500
Subject: initial commit

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+---
+title: Storage.length
+slug: Web/API/Storage/length
+tags:
+  - API
+  - Armazenamento
+  - Armazenamento web
+  - Propriedade
+  - Referencia
+  - Somente Leitura
+  - Web Storage
+translation_of: Web/API/Storage/length
+---
+<p>{{APIRef("Web Storage API")}}</p>
+
+<p>A propriedade length, que é somente leitura, da interface {{domxref("Storage")}} retorna um inteiro que representa o número de itens armazenados no objeto <code>Storage</code>.</p>
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre class="syntaxbox">var <em>aLength</em> = <em>storage</em>.length;</pre>
+
+<h3 id="Retorno">Retorno</h3>
+
+<p>Um inteiro</p>
+
+<h2 id="Exemplo">Exemplo</h2>
+
+<p>A função a seguir adiciona três itens ('bgcolor', 'font' e 'image') ao local storage do domínio atual, em seguida retorna o número de itens no storage:</p>
+
+<pre class="brush: js">function populateStorage() {
+  localStorage.setItem('bgcolor', 'yellow');
+  localStorage.setItem('font', 'Helvetica');
+  localStorage.setItem('image', 'cats.png');
+
+  localStorage.length; // should return 3
+}</pre>
+
+<div class="note">
+<p><strong>Nota</strong>: Para um exemplo do mundo real, veja nosso <a href="https://github.com/mdn/web-storage-demo">Web Storage Demo</a>.</p>
+</div>
+
+<h2 id="Especificações">Especificações</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Especificação</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comentário</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Web Storage', '#dom-storage-length', 'length')}}</td>
+   <td>{{Spec2('Web Storage')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilidade_com_browsers">Compatibilidade com browsers</h2>
+
+<p>{{ CompatibilityTable() }}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari (WebKit)</th>
+  </tr>
+  <tr>
+   <td>localStorage</td>
+   <td>4</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>3.5</td>
+   <td>8</td>
+   <td>10.50</td>
+   <td>4</td>
+  </tr>
+  <tr>
+   <td>sessionStorage</td>
+   <td>5</td>
+   <td>{{CompatUnknown}}</td>
+   <td>2</td>
+   <td>8</td>
+   <td>10.50</td>
+   <td>4</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Edge</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Phone</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>2.1</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{ CompatUnknown }}</td>
+   <td>8</td>
+   <td>11</td>
+   <td>iOS 3.2</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<p>Cada browser tem uma capacidade variada para localStorage e sessionStorage. Aqui existe um <a class="external" href="http://dev-test.nemikor.com/web-storage/support-test/" title="http://dev-test.nemikor.com/web-storage/support-test/">tabela detalhada sobre a capacidade de armazenamento de cada browser</a>.</p>
+
+<div class="note">
+<p><strong>Nota: </strong>desde o iOS 5.1, o Safari Mobile armazena os dados do localStorage no folder de cache, que está sujeito a uma limpeza ocasional baseada em regras do SO, tipicamente, quando o espaço está se esgotando.</p>
+</div>
+
+<h2 id="Veja_também">Veja também</h2>
+
+<p><a href="/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API">Usando a API Web Storage</a></p>
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