Document.hasStorageAccess()

The hasStorageAccess() method of the Document interface returns a Promise that resolves with a boolean value indicating whether the document has access to its first-party storage.

See Storage Access API for more information.

Syntax

var promise = document.hasStorageAccess();

Parameters

None.

Return value

A Promise that resolves with a boolean value indicating whether the document has access to its first-party storage.

If the promise gets resolved and a user gesture event was being processed when the function was originally called, the resolve handler will run as if a user gesture was being processed, so it will be able to call APIs that require user activation.

Examples

document.hasStorageAccess().then(hasAccess => {
  if (hasAccess) {
    // storage access has been granted already.
  } else {
    // storage access hasn't been granted already;
    // you may want to call requestStorageAccess().
  }
});

Specifications

The API is currently only at the proposal stage — the standardization process has yet to begin. You can currently find specification details of the API at Apple's Introducing Storage Access API blog post, and WHATWG HTML issue 3338 — Proposal: Storage Access API.

Browser compatibility

See also

Storage Access API