FileEntrySync | Web API

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关于本文档
基本概念
方法概述
方法
浏览器兼容性
另请参阅
相关话题

非标
此特征是非标准的，且不在标准轨道中。不要在面向 Web 的生产站点中使用它：它不适用于每个用户。实现之间可能存在大的不兼容性，且行为将来可能改变。

FileEntrySync 接口在文件系统 API represents a file in a file system. It lets you write content to a file.

关于本文档

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.

基本概念

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

方法概述


										FileWriterSync
										
											createWriter
										
										() raises (
										
											FileException
										
										);


										File
										
											file
										
										() raises (
										
											FileException
										
										);

方法

createWriter()

创建新的 FileWriter associated with the file that the FileEntry represents.

void createWriter (
) raises (FileException);

参数

None.

FileWriterSync

异常

This method can raise a FileException with the following codes:

异常	描述
`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`INVALID_STATE_ERR`	The file is no longer valid for some reason other than it having been deleted.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);

参数

None.

File

异常

This method can raise a FileException with the following codes:

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`INVALID_STATE_ERR`	The file is no longer valid for some reason other than it having been deleted.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`FileEntrySync` 非标	Chrome 13 Prefixed 13 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge ≤79 Prefixed ≤79 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox No	IE No	Opera No	Safari No	WebView Android 37 Prefixed 37 Prefixed Prefixed Implemented with the vendor prefix: webkit	Chrome Android 18 Prefixed 18 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android 1.0 Prefixed 1.0 Prefixed Prefixed Implemented with the vendor prefix: webkit

图例

完整支持
不支持
非标。预期跨浏览器支持较差。
要求使用供应商前缀或不同名称。

另请参阅

规范： File API: Directories and System Specification WD

参考：文件系统 API

介绍： Basic Concepts About the File System API

元数据

最后修改： 2019 年 3 月 23 日

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