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---
title: storage
slug: Mozilla/Add-ons/WebExtensions/API/storage
tags:
- Add-ons
- Extensions
- Strorage
translation_of: Mozilla/Add-ons/WebExtensions/API/storage
---
<div>{{AddonSidebar}}</div>
<div>使浏览器扩展能够储存及获取数据，以及监听储存的数据的变化。</div>
<div></div>
<p>此存储系统API基于 <a href="/en-US/docs/Web/API/Web_Storage_API">Web Storage API</a>, 并有少许不同。</p>
<p>为了使用该API，您需要在<a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json">manifest.json</a>文件包含"storage"<a href="https://developer.mozilla.org/zh-CN/Add-ons/WebExtensions/manifest.json/permissions">权限</a>。每一个浏览器扩展有自己的储存<font face="Consolas, Liberation Mono, Courier, monospace">区域</font>，每一个储存<font face="Consolas, Liberation Mono, Courier, monospace">区域</font>又分为几种不同的存储类型。</p>
<p>虽然此API类似于{{domxref("Window.localStorage")}}，但仍建议您不要在插件中使用<code>Window.localStorage。当用户由于隐私原因清除历史浏览记录及数据时，火狐会将在浏览器扩展使用</code> localStorage API存储的数据一并清除。而使用 <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/storage/local">storage.local</a>API存储的数据将会恰当保留。</code></p>
<h2 id="类型">类型</h2>
<dl>
<dt>{{WebExtAPIRef("storage.StorageArea")}}</dt>
<dd>代表存储<font face="Consolas, Liberation Mono, Courier, monospace">区域</font>的对象</dd>
<dt>{{WebExtAPIRef("storage.StorageChange")}}</dt>
<dd>代表改变一个储存<font face="Consolas, Liberation Mono, Courier, monospace">区域</font>的对象</dd>
</dl>
<h2 id="属性">属性</h2>
<p><font face="Consolas, Liberation Mono, Courier, monospace">storage有3个属性，每一个代表不同的存储区域。</font></p>
<dl>
<dt>{{WebExtAPIRef("storage.sync")}}</dt>
<dd>表示一个同步的储存区域。在此区域的数据通过浏览器进行同步，用户可通过登录使用不同的设备访问到浏览器所有可用的实例对象。</dd>
<dt>{{WebExtAPIRef("storage.local")}}</dt>
<dd>表示一个本地的存储区域。此区域的数据属于其所在的插件。</dd>
<dt>{{WebExtAPIRef("storage.managed")}}</dt>
<dd>表示管理的存储区域。此区域的数据由本域名下的管理员设置且对该插件是只读的。试图修改此区域数据会得到一个错误。</dd>
</dl>
<h2 id="事件">事件</h2>
<dl>
<dt>{{WebExtAPIRef("storage.onChanged")}}</dt>
<dd>当storage有数据变化时，此事件将被触发。</dd>
</dl>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{Compat("webextensions.api.storage")}}</p>
<div class="hidden note">
<p>"Chrome不兼容"这部分来源于 <a href="https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Chrome_incompatibilities"> https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Chrome_incompatibilities</a> 使用<a href="/en-US/docs/Template:WebExtChromeCompat">WebExtChromeCompat</a> macro.</p>
<p>如果需要更新这部分，请编辑 <a href="https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Chrome_incompatibilities">https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Chrome_incompatibilities</a>, 然后刷新页面即可看见所做更改。</p>
</div>
<h3 id="在Edge中的不兼容">在Edge中的不兼容</h3>
<p>Promises在Edge中不被支持，使用callbacks代替。</p>
<p>{{WebExtExamples("h2")}}</p>
<div class="note"><strong>Acknowledgements</strong>
<p>这个API基于Chromium的 <a href="https://developer.chrome.com/extensions/storage"><code>chrome.storage</code></a> API. 这篇文档也来源于Chromium 代码中的 <a href="https://chromium.googlesource.com/chromium/src/+/master/extensions/common/api/storage.json"><code>storage.json</code></a>.</p>
<p>Microsoft Edge的适配数据由Microsoft Corporation提供并且被包含在Creative Commons Attribution 3.0 United States License许可证下.</p>
</div>
<div class="hidden">
<pre>// Copyright 2015 The Chromium Authors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
</pre>
</div>
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