File
The File interface provides information about -- and access to the contents of -- files.
These are generally retrieved from a FileList object returned as a result of a user selecting files using the input element, or from a drag and drop operation's DataTransfer object.
The file reference can be saved when the form is submitted while the user is offline, so that the data can be retrieved and uploaded when the Internet connection is restored.
Value members
Concrete methods
The File.lastModified read-only property provides the last modified date of the file as the number of milliseconds since the Unix epoch (January 1, 1970 at midnight). Files without a known last modified date return the current date.
The File.lastModified read-only property provides the last modified date of the file as the number of milliseconds since the Unix epoch (January 1, 1970 at midnight). Files without a known last modified date return the current date.
Returns the name of the file. For security reasons, the path is excluded from this property.
Returns the name of the file. For security reasons, the path is excluded from this property.
The File.webkitRelativePath is a read-only property that contains a string which specifies the file's path relative to the directory selected by the user in an element with its webkitdirectory attribute set.
The File.webkitRelativePath is a read-only property that contains a string which specifies the file's path relative to the directory selected by the user in an element with its webkitdirectory attribute set.
- Returns:
A string containing the path of the file relative to the ancestor directory the user selected.
Inherited methods
A string indicating the MIME type of the data contained in the Blob. If the type is unknown, this string is empty.
A string indicating the MIME type of the data contained in the Blob. If the type is unknown, this string is empty.
- Inherited from:
- Blob
Returns a promise that resolves with an ArrayBuffer containing the entire contents of the blob as binary data.
Returns a promise that resolves with an ArrayBuffer containing the entire contents of the blob as binary data.
- Inherited from:
- Blob
The size, in bytes, of the data contained in the Blob object.
The size, in bytes, of the data contained in the Blob object.
- Inherited from:
- Blob
A string indicating the MIME type of the data contained in the Blob. If the type is unknown, this string is empty.
A string indicating the MIME type of the data contained in the Blob. If the type is unknown, this string is empty.
- Inherited from:
- Blob
Returns a ReadableStream that can be used to read the contents of the blob.
Returns a ReadableStream that can be used to read the contents of the blob.
- Inherited from:
- Blob
Returns a promise that resolves with a USVString containing the entire contents of the blob interpreted as UTF-8 text.
Returns a promise that resolves with a USVString containing the entire contents of the blob interpreted as UTF-8 text.
- See also:
- Inherited from:
- Blob