StorageManager.persisted

The persisted property of the StorageManager interface returns a Promise that resolves to true if persistence has already been granted for your site's storage.

Syntax

navigator.storage.perisisted().then(function(granted) { ... })

Parameters

None.

Returns

A Promise that resolves to a Boolean.

Example

if (navigator.storage && navigator.storage.persist) 
  navigator.storage.persisted().then(function(persistent) {
    if (persistent)
      console.log("Storage will not be cleared except by explicit user action");
    else
      console.log("Storage may be cleared by the UA under storage pressure.");
  });

Specifications

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

Browser Compatibility