FileSystemDirectoryReader: readEntries() method
The FileSystemDirectoryReader interface's readEntries() method retrieves the directory entries
within the directory being read and delivers them in an array to a provided callback function.
The objects in the array are all based upon FileSystemEntry.
Generally, they are either FileSystemFileEntry objects, which represent standard files, or FileSystemDirectoryEntry objects, which represent directories.
Syntax
js
readEntries(successCallback)
readEntries(successCallback, errorCallback)
Parameters
successCallback-
A function which is called when the directory's contents have been retrieved. The function receives a single input parameter: an array of file system entry objects, each based on
FileSystemEntry. Generally, they are eitherFileSystemFileEntryobjects, which represent standard files, orFileSystemDirectoryEntryobjects, which represent directories. If there are no files left, or you've already calledreadEntries()on thisFileSystemDirectoryReader, the array is empty. errorCallbackOptional-
A callback function which is called if an error occurs while reading from the directory. It receives one input parameter: a
DOMExceptionobject describing the error which occurred.
Return value
None (undefined).
Examples
See DataTransferItem.webkitGetAsEntry() for example code that uses this method.
Specifications
| Specification |
|---|
| File and Directory Entries API # dom-filesystemdirectoryreader-readentries |
Browser compatibility
BCD tables only load in the browser
On Chrome 77, readEntries() will only return the first 100 FileSystemEntry instances. In order to obtain all of the
instances, readEntries() must be called multiple times.