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FileSystemDirectoryHandle: keys() method - Web APIs

FileSystemDirectoryHandle: keys() method

Baseline 2023

Newly available

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

Note: This feature is available in Web Workers.

The keys() method of the FileSystemDirectoryHandle interface returns a new asynchronous iterator for the iteration of the key of the entries within the FileSystemDirectoryHandle on which this method is called.

Syntax Parameters

None.

Return value

A new asynchronous iterator containing the keys of each entry within the FileSystemDirectoryHandle.

Exceptions
NotAllowedError DOMException

Thrown if the PermissionStatus.state for the handle is not 'granted' in read mode.

NotFoundError DOMException

Thrown if the current entry is not found.

Examples

Use the for await...of loop can simplify the iteration process.

const dirHandle = await window.showDirectoryPicker();

for await (const key of dirHandle.keys()) {
  console.log(key);
}
Specifications Browser compatibility See also

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