Provides the current state of the reading operation.
var state = instanceOfFileReader.readyState
A number which is one of the three possible state constants define for the
The definition of 'FileReader' in that specification.
|Working Draft||Initial definition|
|Feature||Firefox (Gecko)||Chrome||Internet Explorer||Opera||Safari|
|Basic support||3.6 (1.9.2)||7||10||12.02||6.0.2|
|Feature||Firefox Mobile (Gecko)||Android||IE Mobile||Opera Mobile||Safari Mobile|
 Prior to Gecko 2.0 beta 7 (Firefox 4.0 beta 7), all
Blob parameters below were
File parameters; this has since been updated to match the specification correctly. Prior to Gecko 13.0 (Firefox 13.0 / Thunderbird 13.0 / SeaMonkey 2.10) the
FileReader.error property returned a
FileError object. This interface has been removed and
FileReader.error is now returning the
DOMError object as defined in the latest FileAPI draft.
 IE9 has a File API Lab.
 Opera has partial support in 11.1.