FileReader

package js.html

extends EventTarget

Available on js

The FileReader object lets web applications asynchronously read the contents of files (or raw data buffers) stored on the user's computer, using File or Blob objects to specify the file or data to read.

Documentation FileReader by Mozilla Contributors, licensed under CC-BY-SA 2.5.

See:

https://developer.mozilla.org/en-US/docs/Web/API/FileReader

Constructor

new ()

Throws:

null	DOMError

Variables

read only error:DOMError

A DOMError representing the error that occurred while reading the file.

onabort:Function

A handler for the abort event. This event is triggered each time the reading operation is aborted.

onerror:Function

A handler for the error event. This event is triggered each time the reading operation encounter an error.

onload:Function

A handler for the load event. This event is triggered each time the reading operation is successfully completed.

onloadend:Function

A handler for the loadend event. This event is triggered each time the reading operation is completed (either in success or failure).

onloadstart:Function

A handler for the loadstart event. This event is triggered each time the reading is starting.

onprogress:Function

A handler for the progress event. This event is triggered while reading a Blob content.

read only readyState:Int

A number indicating the state of the FileReader. This is one of the following:

EMPTY	0	No data has been loaded yet.
LOADING	1	Data is currently being loaded.
DONE	2	The entire read request has been completed.

read only result:Dynamic

The file's contents. This property is only valid after the read operation is complete, and the format of the data depends on which of the methods was used to initiate the read operation.

Methods

abort ():Void

Throws:

null	DOMError

readAsArrayBuffer (blob:Blob):Void

Throws:

null	DOMError

readAsBinaryString (filedata:Blob):Void

Throws:

null	DOMError

readAsDataURL (blob:Blob):Void

Throws:

null	DOMError

readAsText (blob:Blob, label:String = ""):Void

Throws:

null	DOMError

Static variables

static inline read only DONE:Int = 2

static inline read only EMPTY:Int = 0

static inline read only LOADING:Int = 1