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• 特性
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

安全上下文
此特征只可用于 安全上下文 (HTTPS)，在某些或所有 支持浏览器 .

StorageEstimate 字典用于 StorageManager 以提供站点或应用程序数据存储的大小及正在使用的存储的估计。 estimate() 方法返回符合此字典的对象当其 Promise 解析。

These values are only estimates for several reasons, including both performance and preventing storage capacity data from being used for fingerprinting purposes. See the individual property pages for details.

特性

quota 安全上下文

A numeric value in bytes which provides a conservative approximation of the total storage the user's device or computer has available for the site origin or Web app. It's possible that there's more than this amount of space available though you can't rely on that being the case.

usage 安全上下文

A numeric value in bytes approximating the amount of storage space currently being used by the site or Web app, out of the available space as indicated by quota . Unit is byte.

usageDetails 安全上下文

A dictionary containing a breakdown of usage by storage system.  All included members will have a usage greater than 0 and any storage system with 0 usage will be excluded from the dictionary.

规范

规范	状态	注释
存储 在该规范中的 StorageEstimate 定义。	实时标准	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
StorageEstimate	Chrome 52	Edge ≤79	Firefox 51	IE ?	Opera 42	Safari ?	WebView Android 52	Chrome Android 52	Firefox Android 51	Opera Android 42	Safari iOS ?	Samsung Internet Android 6.0
quota	Chrome 52	Edge ≤79	Firefox 51	IE ?	Opera 42	Safari ?	WebView Android 52	Chrome Android 52	Firefox Android 51	Opera Android 42	Safari iOS ?	Samsung Internet Android 6.0
usage	Chrome 52	Edge ≤79	Firefox 51	IE ?	Opera 42	Safari ?	WebView Android 52	Chrome Android 52	Firefox Android 51	Opera Android 42	Safari iOS ?	Samsung Internet Android 6.0

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

另请参阅

• 存储 API
• StorageManager
• StorageManager.estimate()
• navigator.storage

元数据

• 最后修改： Apr 7, 2020

相关话题

1. 存储 API
2. StorageEstimate
3. 特性

   1. quota
4. 存储相关页面在该规范中的 NaN 定义。

   1. Navigator.storage
   2. NavigatorStorage
   3. StorageManager
   4. WorkerNavigator.storage