Represents a local file system. This interface is implemented by the window object, therefore its predefined methods and constants are called similarly to the global ones.
Non-standard extensions specific to AMP Hybrid Client are grouped in the LocalFileSystem object and should be called using the
window.LocalFileSystem.CONSTANT signature, as shown in the Non-standard constants section below.
| Name | Description |
|---|---|
| requestFileSystem | Requests a filesystem, in which the application data are stored. |
| resolveFileSystemURL | Allows the user to look up the entry for a file or a directory referred to by a local URL. |
The table below lists the constant values related to storage, that are predefined within
the window object.
| Constant | Description | Type | Value |
|---|---|---|---|
| TEMPORARY | Used for storage with no guarantee of persistence. | unsigned short |
0 |
| PERSISTENT | Used for storage that should not be removed by the user agent without application or user permission. | unsigned short |
1 |
The constant values below are predefined for the window.LocalFileSystem
object. The names of the filesystems are defined as the names of the constants that represent
them.
| Constant | Description | Type | Value |
|---|---|---|---|
| SHARED_AMONG_APPS | Used for storage that is shared among apps, with no guarantee of persistence. | unsigned short |
2 |
| SHARED_AMONG_USERS | Used for storage that is shared among users. | unsigned short |
4 |
| EXTERNAL |
Used for storage that can hold a relatively large amount of data and is shared across all applications. NoteExternal storage is supported by Android devices only. |
unsigned short |
8 |