createWritable method

JSPromise<FileSystemWritableFileStream> createWritable([ FileSystemCreateWritableOptions options ])

The createWritable() method of the FileSystemFileHandle interface creates a FileSystemWritableFileStream that can be used to write to a file. The method returns a Promise which resolves to this created stream.

Any changes made through the stream won't be reflected in the file represented by the file handle until the stream has been closed. This is typically implemented by writing data to a temporary file, and only replacing the file represented by file handle with the temporary file when the writable filestream is closed.

Implementation

external JSPromise<FileSystemWritableFileStream> createWritable(
    [FileSystemCreateWritableOptions options]);