StorageEstimate dictionary is used by the
StorageManager to provide estimates of the size of a site's or application's data store and how much of it is in use. The
estimate() method returns an object that conforms to this dictionary when its
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.
This dictionary currently always has both of the following properties defined.
- A numeric value 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.
- A numeric value approximating the amount of storage space currently being used by the site or Web app, out of the available space as indicated by
The definition of 'StorageEstimate' in that specification.
|Living Standard||Initial definition.|
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!
|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||?|