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---
title: bookmarks.getTree()
slug: Mozilla/Add-ons/WebExtensions/API/bookmarks/getTree
tags:
- API
- WebExtensions
- getTree
- 书签
- 参考
- 拓展
- 方法
- 附件
- 非标准
translation_of: Mozilla/Add-ons/WebExtensions/API/bookmarks/getTree
---
<div>{{AddonSidebar()}}</div>
<p><strong><code>bookmarks.getTree()</code></strong> 返回一个数组，该数组每一项为{{WebExtAPIRef("bookmarks.BookmarkTreeNode")}}对象，作为书签树的根节点。</p>
<p>如果它们是文件夹的话，你可以通过其<code>children属性及其后代的children属性</code>递归地访问整个树。</p>
<p>这是一个异步的函数，返回<code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">Promise</a>。</code></p>
<h2 id="使用格式">使用格式</h2>
<pre class="syntaxbox brush:js">var gettingTree = browser.bookmarks.getTree()
</pre>
<h3 id="参数">参数</h3>
<p>无。</p>
<h3 id="返回值">返回值</h3>
<p><code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">Promise</a>对象，该对象未来会得到一个填充代表根节点的</code><code><a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/bookmarks/BookmarkTreeNode" title="An object of type bookmarks.BookmarkTreeNode represents a node in the bookmark tree, where each node is a bookmark or bookmark folder. Child nodes are ordered by an index within their respective parent folders.">bookmarks.BookmarkTreeNode</a>对象的数组。</code></p>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<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> </p>
<p>{{Compat("webextensions.api.bookmarks.getTree")}}</p>
<p> </p>
<h2 id="示例">示例</h2>
<p>这个示例会打印出整个书签树：</p>
<pre class="brush: js">function makeIndent(indentLength) {
return ".".repeat(indentLength);
}
function logItems(bookmarkItem, indent) {
if (bookmarkItem.url) {
console.log(makeIndent(indent) + bookmarkItem.url);
} else {
console.log(makeIndent(indent) + "Folder");
indent++;
}
if (bookmarkItem.children) {
for (child of bookmarkItem.children) {
logItems(child, indent);
}
}
indent--;
}
function logTree(bookmarkItems) {
logItems(bookmarkItems[0], 0);
}
function onRejected(error) {
console.log(`An error: ${error}`);
}
var gettingTree = browser.bookmarks.getTree();
gettingTree.then(logTree, onRejected);
</pre>
<p>{{WebExtExamples}}</p>
<div class="note"><strong>Acknowledgements</strong>
<p>This API is based on Chromium's <a href="https://developer.chrome.com/extensions/bookmarks#method-getTree"><code>chrome.bookmarks</code></a> API. This documentation is derived from <a href="https://chromium.googlesource.com/chromium/src/+/master/chrome/common/extensions/api/bookmarks.json"><code>bookmarks.json</code></a> in the Chromium code.</p>
<p>Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.</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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