StorageEstimate.usage

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

The StorageEstimate dictionary's usage property is a conservative approximation of how much storage is allotted to the origin or Web app that called StorageManager.estimate(); there may be more space available, but there will not be less. The value is an estimate because the user agent may use compression, duplication prevention techniques, and other methods to improve storage efficiency.

Syntax

usage = StorageEstimate.usage;

Value

A numeric value specifying an approximation of the total amount of storage space available for use by the application.

Example

In this example, we obtain the usage estimates and present the percentage of storage capacity currently used to the user.

HTML content

<p>
  You're currently using about <span id="percent">
  </span>% of your available storage.
</p>

JavaScript content

navigator.storage.estimate().then(function(estimate) {
  document.getElementById("percent").innerHTML =
      (estimate.usage / estimate.quota).toFixed(2);
});

Result

Specifications

Specification Status Comment
Storage
The definition of 'usage' in that specification.
Living Standard Initial definition

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 52Edge ? Firefox Full support 51IE ? Opera Full support 42Safari ? WebView Android ? Chrome Android Full support 52Edge Mobile ? Firefox Android Full support 51Opera Android Full support 42Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also

 

Document Tags and Contributors

Contributors to this page: duncancumming, connorshea, chrisdavidmills, Sheppy
Last updated by: duncancumming,