WebFileFileReaderEventMapinterface FileReaderEventMapProperties ##abort: ProgressEvent<FileReader>#error: ProgressEvent<FileReader>#load: ProgressEvent<FileReader>#loadend: ProgressEvent<FileReader>#loadstart: ProgressEvent<FileReader>#progress: ProgressEvent<FileReader>
interface FileReaderEventMapProperties ##abort: ProgressEvent<FileReader>#error: ProgressEvent<FileReader>#load: ProgressEvent<FileReader>#loadend: ProgressEvent<FileReader>#loadstart: ProgressEvent<FileReader>#progress: ProgressEvent<FileReader>