The FileSystemDirectoryEntry interface of the File and Directory Entries API represents a directory in a file system. It provides methods which make it possible to access and manipulate the files in a directory, as well as to access the entries within the directory.

You can create a new directory by calling getDirectory(). If you want to create subdirectories, create each child directory in sequence. If you try creating a directory using a full path that includes parent directories that do not exist yet, an error is returned. So create the hierarchy by recursively adding a new path after creating the parent directory.

In the following code snippet, we create a directory called "Documents."

// Taking care of the browser-specific prefixes.
window.requestFileSystem =
  window.requestFileSystem || window.webkitRequestFileSystem;
window.directoryEntry = window.directoryEntry || window.webkitDirectoryEntry;

// …

function onFs(fs) {
  fs.root.getDirectory(
    "Documents",
    { create: true },
    (directoryEntry) => {
      //directoryEntry.isFile === false
      //directoryEntry.isDirectory === true
      //directoryEntry.name === 'Documents'
      //directoryEntry.fullPath === '/Documents'
    },
    onError,
  );
}

// Opening a file system with temporary storage
window.requestFileSystem(TEMPORARY, 1024 * 1024 /*1MB*/, onFs, onError);

This interface has no properties of its own, but inherits properties from its parent interface, FileSystemEntry.

This interface inherits methods from its parent interface, FileSystemEntry.

createReader()

Creates a FileSystemDirectoryReader object which can be used to read the entries in this directory.

getDirectory()

Returns a FileSystemDirectoryEntry object representing a directory located at a given path, relative to the directory on which the method is called.

getFile()

Returns a FileSystemFileEntry object representing a file located within the directory's hierarchy, given a path relative to the directory on which the method is called.

• File and Directory Entries API
• Introduction to the File and Directory Entries API
• FileSystemDirectoryReader
• FileSystemEntry
• FileSystemFileEntry