This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The queryInfo() property of the StorageQuota interface returns a StorageInfo object containting the current data usage and available quota information for the application.
StorageQuota.queryInfo().then(function(storageInfo) { ... }) None.
A reference to a StorageInfo object.
| Specification | Status | Comment | 
|---|---|---|
| Quota Management API The definition of 'queryInfo()' in that specification.  |  Obsolete | Initial definition. | 
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 14 | ? | ? | ? | ? | ? | 
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | ? | ? | ? | ? | ? | ? | ? | 
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    https://developer.mozilla.org/en-US/docs/Web/API/StorageQuota/queryInfo