HTML5 API reference - HTML5 in Action - page 461

Table B.34 lists methods associated with the FileWriter object. A FileWriter ob-
ject can perform multiple write actions, rather than just saving a single Blob .

Table B.34. FileWriter API

Attribute/method Description

seek(offset) Sets a specific file location at which the next write will occur.

truncate(size) Alters the length of the file to the size passed in bytes.

write(data) Writes the input data to a Blob object.

TableB.35 lists the methods associated with the FileSaver object which has methods to
write a Blob object to a file.

Table B.35. FileSaver API

Constructor/attribute/
method

Description

FileSaver(data) Creates a FileSaver object with Blob data.

abort() Terminates file saving.

Table B.36 lists the events associated with the FileSaver object which has events to
monitor the progress of writing a Blob to a file.

Table B.36. FileSaver events

Event name Description

writestart Fires when starting a writing event.

progress Fires repeatedly while file is being written.

write Fires when a file is being written to.

abort Fires when file writing is canceled.

error Fires in response to an error or an abort.

writeend Fires when writing to a file has ended.

Table B.37 lists the methods associated with the FileEntry object. A FileEntry ob-
ject has methods to write and inspect the state of a file.