StorageEstimate - Web API 接口参考 编辑

Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

 

StorageEstimate 提供对你的域名或Web app的数据存储空间总量和已用量的估计值,该对象实例由StorageManager的estimate() 方法返回的Promise返回.

这些值仅为估计值有多种原因,既有对性能的考虑,也有防止将其作为指纹(fingerprinting)的目的.详情请参看属性.

属性

该对象目前总是同时包含以下两个属性.

quota Secure context

用户设备为你的域名或Web app预留的存储空间总大小,且该大小为估计值.虽然实际上可能有比这更多的存储空间,但这时你不应使用那多余的部分.

usage Secure context

你的域名或Web app已经使用的存储空间大小,且该大小为估计值.剩余可用空间请综合quota属性计算.

规范

Specification	Status	Comment
Storage StorageEstimate	Living Standard	Initial definition.

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

• Desktop
• Mobile

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Microsoft Edge	Opera	Safari (WebKit)
Basic support	55	57 (57)	?	?	42	?

Feature	Android Webview	Chrome for Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	?	55	57.0 (57)	?	42	?

相关链接

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