Web/API/FileEntrySync

From Get docs

Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.


The FileEntrySync interface of the File System API represents a file in a file system. It lets you write content to a file.

Inherits from: EntrySync

About this document

This document was last updated on March 2, 2012 and follows the W3C Specifications (Working Draft) drafted on April 19, 2011.

This specification is more or less abandoned as it didn't get significant traction among browser makers.

Basic concepts

To write content to file, create a FileWriter object by calling createWriter().

Method overview

FileWriterSync createWriter () raises (FileException);
File file () raises (FileException);

Methods

createWriter()

Creates a new FileWriter associated with the file that the FileEntry represents.

void createWriter (
) raises (FileException);
Parameter

None.

Returns

FileWriterSync

Exceptions

This method can raise a FileException with the following codes:

Exception

Description

NOT_FOUND_ERR

The file does not exist.

INVALID_STATE_ERR

The file is no longer valid for some reason other than it having been deleted.

file()

Returns a File that represents the current state of the file that this FileEntry represents.

void file (
) raises (FileException);
Parameter

None.

Returns

File

Exceptions

This method can raise a FileException with the following codes:

Exception

Description

NOT_FOUND_ERR

The file does not exist.

INVALID_STATE_ERR

The file is no longer valid for some reason other than it having been deleted.

Browser compatibility

Update compatibility data on GitHub

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet

FileEntrySync

Non-standard'

Chrome Full support 13

Prefixed'

Full support 13

Prefixed'

Prefixed' Implemented with the vendor prefix: webkit

Edge Full support ≤79

Prefixed'

Full support ≤79

Prefixed'

Prefixed' Implemented with the vendor prefix: webkit

Firefox

No support No

IE

No support No

Opera

No support No

Safari

No support No

WebView Android Full support 37

Prefixed'

Full support 37

Prefixed'

Prefixed' Implemented with the vendor prefix: webkit

Chrome Android Full support 18

Prefixed'

Full support 18

Prefixed'

Prefixed' Implemented with the vendor prefix: webkit

Firefox Android

No support No

Opera Android

No support No

Safari iOS

No support No

Samsung Internet Android Full support 1.0

Prefixed'

Full support 1.0

Prefixed'

Prefixed' Implemented with the vendor prefix: webkit

Legend

Full support  
Full support
No support  
No support
Non-standard. Expect poor cross-browser support.'
Non-standard. Expect poor cross-browser support.
Requires a vendor prefix or different name for use.'
Requires a vendor prefix or different name for use.


See also

Specification:File API: Directories and System SpecificationWD

Reference: File System API

Introduction: Basic Concepts About the File System API