在此页

• 句法
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

create property on the FileSystemFlags dictionary is used to indicate whether or not the file should be created if it's missing. FileSystemFlags is only used when calling FileSystemDirectoryEntry.getFile() or FileSystemDirectoryEntry.getDirectory() .

句法

fileSystemFlags.create = booleanValue
					

值

The table below describes the result of each possible combination of these flags depending on whether or not the target file or directory path already exists.

Option values			File/directory condition	结果
create		exclusive
false		n/a [1]	Path exists and matches the desired type (depending on whether the function called is getFile() or getDirectory()	successCallback is called with a FileSystemFileEntry if getFile() was called or a FileSystemDirectoryEntry if getDirectory() 被调用。
false		n/a [1]	Path exists but doesn't match the desired type	errorCallback is called with an appropriate error code (if the callback was provided).
true		false	Path exists	The existing file or directory is removed and replaced with a new one, then the successCallback is called with a FileSystemFileEntry 或 FileSystemDirectoryEntry , as appropriate.
true		false	Path doesn't exist	The file or directory is created, then a FileSystemFileEntry 或 FileSystemDirectoryEntry 被传递给 successCallback , as appropriate.
true		true	Path exists	errorCallback is called with an appropriate error, such as FileError.PATH_EXISTS_ERR .
true		true	Path doesn't exist	The file or directory is created, then a FileSystemFileEntry 或 FileSystemDirectoryEntry 被传递给 successCallback , as appropriate.

[1] When create is false ，值对于 exclusive is irrelevant and ignored.

规范

规范	状态	注释
文件和目录条目 API The definition of 'FileSystemFlags' in that specification.	草案	最初的规范。

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
create	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 部分支持 50 部分支持 50 For security reasons, Firefox does not support creating files. This option has no effect.	IE No	Opera No	Safari No	WebView Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit	Chrome Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android 部分支持 50 部分支持 50 For security reasons, Firefox does not support creating files. This option has no effect.	Opera Android No	Safari iOS No	Samsung Internet Android Yes Prefixed Yes Prefixed Prefixed Implemented with the vendor prefix: webkit

图例

完整支持

完整支持

部分支持

部分支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

见实现注意事项。

要求使用供应商前缀或不同名称。

要求使用供应商前缀或不同名称。

另请参阅

• 文件和目录条目 API
• 文件系统 API 介绍
• FileSystemFlags
• FileSystemDirectoryEntry.getFile() and FileSystemDirectoryEntry.getDirectory()

元数据

• 最后修改： Dec 25, 2019

相关话题

1. 文件和目录条目 API
2. FileSystemFlags
3. 特性

   1. create
   2. exclusive
4. 文件系统 API 相关页面

   1. FileError
   2. FileException
   3. FileHandle
   4. FileRequest
   5. FileSystem
   6. FileSystemDirectoryEntry
   7. FileSystemDirectoryEntrySync
   8. FileSystemDirectoryReader
   9. FileSystemDirectoryReaderSync
   10. FileSystemEntry
   11. FileSystemEntrySync
   12. FileSystemFileEntry
   13. FileSystemFileEntrySync
   14. FileSystemSync
   15. HTMLInputElement
   16. LocalFileSystem
   17. LocalFileSystemSync
   18. LockedFile
   19. 元数据
   20. Window.requestFileSystem()
   21. Window.resolveLocalFileSystemURL()
   22. WorkerGlobalScope.requestFileSystemSync()