File System API guide 编辑

这是一个实验中的功能
此功能某些浏览器尚在开发中，请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订，所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

The File System API simulates a local file system that web apps can navigate around. You can develop apps that can read, write, and create files and directories in a virtual, sandboxed file system.

The asynchronous API methods return without blocking the calling thread. The asynchronous API doesn't give you data by returning values; instead, you have to pass a callback function. The synchronous API is intended to be used inside WebWorkers.

For an overview of the File System API, see the following articles:

• 文件系统API的基本概念

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

• Desktop
• Mobile

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Asynchronous API	13 webkit	未实现	未实现	15 webkit	未实现
Synchronous API	13 webkit	未实现	未实现	15 webkit	未实现

Feature	Android	Chrome for Android	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Asynchronous API	未实现	0.16webkit	未实现	未实现	14 webkit	未实现
Synchronous API	未实现	0.16webkit	未实现	未实现	14 webkit	未实现

See also

• File System API reference
• Specification: File API: Directories and System SpecificationWD