FileSystemFlags.exclusive - Web APIs 编辑
Experimental
This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The exclusive property on the FileSystemFlags dictionary is used in tandem with the create property to determine whether or not it's acceptable to require that the file not already exist when the reference to it is created by calling FileSystemDirectoryEntry.getFile() or FileSystemDirectoryEntry.getDirectory().
Syntax
fileSystemFlags.exclusive = booleanValue
Values
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 | Result | ||
|---|---|---|---|---|
create | exclusive | |||
false | n/a[1] | Path exists and matches the desired type (depending on whether the function called is getFile() or getDirectory() | The successCallback is called with a FileSystemFileEntry if getFile() was called or a FileSystemDirectoryEntry if getDirectory() was called. | |
false | n/a[1] | Path exists but doesn't match the desired type | The 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 or a FileSystemDirectoryEntry, as appropriate. | |
true | false | Path doesn't exist | The file or directory is created, then a FileSystemFileEntry or a FileSystemDirectoryEntry is passed to the successCallback, as appropriate. | |
true | true | Path exists | The 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 or a FileSystemDirectoryEntry is passed to the successCallback, as appropriate. | |
[1] When create is false, the value of exclusive is irrelevant and ignored.
Specifications
| Specification | Status | Comment |
|---|---|---|
| File and Directory Entries API The definition of 'FileSystemFlags' in that specification. | Draft | Initial specification. |
Browser compatibility
BCD tables only load in the browser
See also
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论