StorageManager.persist()

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

The persist() method of the StorageManager interface requests permission to use persistent storage, and returns a Promise that resolves to true if permission is granted and box mode is persistent, and false otherwise.

Syntax

persist()

Parameters

None.

Return value

A Promise that resolves to a Boolean.

Example

if (navigator.storage && navigator.storage.persist) {
  navigator.storage.persist().then((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
Storage Standard
# ref-for-dom-storagemanager-persist

Browser compatibility

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