FileSystemDirectoryHandle

The FileSystemDirectoryHandle interface of the File System Access API provides a handle to a file system directory. The interface is accessed via the window.showDirectoryPicker() method.

Inherits properties from its parent, FileSystemHandle.

Inherits methods from its parent, FileSystemHandle.

FileSystemDirectoryHandle.entries()

Returns an Array of a given object's own enumerable property [key, value] pairs

FileSystemDirectoryHandle.getFileHandle()

Returns a FileSystemFileHandle for a file with the specified name, within the directory the method is called.

FileSystemDirectoryHandle.getDirectoryHandle()

Returns a FileSystemDirectoryHandle for a subdirectory with the specified name within the directory handle on which the method is called.

FileSystemDirectoryHandle.keys()

Returns a new Array Iterator containing the keys for each item in FileSystemDirectoryHandle.

FileSystemDirectoryHandle.removeEntry()

Attempts to remove an entry if the directory handle contains a file or directory called the name specified.

FileSystemDirectoryHandle.resolve()

Returns an Array of directory names from the parent handle to the specified child entry, with the name of the child entry as the last array item.

FileSystemDirectoryHandle.values()

Returns a new Array Iterator containing the values for each index in the FileSystemDirectoryHandle object.

The following example returns a directory handle with the specified name, if the directory does not exist it is created.

const dirName = 'directoryToGetName';

// assuming we have a directory handle: 'currentDirHandle'
const subDir = currentDirHandle.getDirectoryHandle(dirName, {create: true});

The following asynchronous function uses resolve() to find the path to a chosen file, relative to a specified directory handle.

async function returnPathDirectories(directoryHandle) {

  // Get a file handle by showing a file picker:
  const handle = await self.showOpenFilePicker();
  if (!handle) {
    // User cancelled, or otherwise failed to open a file.
    return;
  }

  // Check if handle exists inside directory our directory handle
  const relativePaths = await directoryHandle.resolve(handle);

  if (relativePath === null) {
    // Not inside directory handle
  } else {
    // relativePath is an array of names, giving the relative path

    for (const name of relativePaths) {
      // log each entry
      console.log(name);
    }
  }
}

• File System Access API
• The File System Access API: simplifying access to local files