FileReader

open class FileReader : EventTarget(source)

The FileReader interface 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.

MDN Reference

Constructors

FileReader

constructor()

Types

Companion

object Companion

ReadyState

sealed interface ReadyState

Properties

DONE

val DONE: FileReader.ReadyState

EMPTY

val EMPTY: FileReader.ReadyState

error

val error: DOMException?

The error read-only property of the FileReader interface returns the error that occurred while reading the file.

val LOADING: FileReader.ReadyState

onabort

var onabort: EventHandler<ProgressEvent, FileReader, FileReader>?

MDN Reference

onerror

var onerror: EventHandler<ProgressEvent, FileReader, FileReader>?

MDN Reference

onload

var onload: EventHandler<ProgressEvent, FileReader, FileReader>?

MDN Reference

onloadend

var onloadend: EventHandler<ProgressEvent, FileReader, FileReader>?

MDN Reference

onloadstart

var onloadstart: EventHandler<ProgressEvent, FileReader, FileReader>?

MDN Reference

onprogress

var onprogress: EventHandler<ProgressEvent, FileReader, FileReader>?

MDN Reference

readyState

val readyState: FileReader.ReadyState

The readyState read-only property of the FileReader interface provides the current state of the reading operation.

result

val result: JsAny?

The result read-only property of the FileReader interface returns the file's contents.

Functions

abort

fun abort()

The abort() method of the FileReader interface aborts the read operation.

addEventListener

fun <E : Event> EventTargetLike.addEventListener(type: EventType<E>, handler: (E) -> Unit, options: AddEventListenerOptions? = undefined)

The addEventListener() method of the EventTarget interface sets up a function that will be called whenever the specified event is delivered to the target.

dispatchEvent

open fun dispatchEvent(event: Event): Boolean

The dispatchEvent() method of the EventTarget sends an Event to the object, (synchronously) invoking the affected event listeners in the appropriate order.

readAsArrayBuffer

fun readAsArrayBuffer(blob: Blob)

The readAsArrayBuffer() method of the FileReader interface is used to start reading the contents of a specified Blob or File.

readAsDataURL

fun readAsDataURL(blob: Blob)

The readAsDataURL() method of the FileReader interface is used to read the contents of the specified Blob or File.

readAsText

fun readAsText(blob: Blob, encoding: String = definedExternally)

The readAsText() method of the FileReader interface is used to read the contents of the specified Blob or File.

removeEventListener

fun <E : Event> EventTargetLike.removeEventListener(type: EventType<E>, handler: (E) -> Unit, options: EventListenerOptions? = undefined)

The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener() from the target.

when

fun <T : Event> when(type: EventType<T>, options: ObservableEventListenerOptions? = definedExternally): Observable<T>

MDN Reference