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FileReader

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.

interface FileReader extends EventTarget {
readonly DONE: number;
readonly EMPTY: number;
readonly error: DOMException | null;
readonly LOADING: number;
onabort: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null;
onerror: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null;
onload: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null;
onloadend: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null;
onloadstart: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null;
onprogress: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null;
readonly readyState: number;
readonly result: string | ArrayBuffer | null;
abort(): void;
addEventListener<K extends keyof FileReaderEventMap>(
type: K,
listener: (this: FileReader, ev: FileReaderEventMap[K]) => any,
options?: boolean | AddEventListenerOptions,
): void;
addEventListener(
type: string,
options?: boolean | AddEventListenerOptions,
): void;
readAsArrayBuffer(blob: Blob): void;
readAsBinaryString(blob: Blob): void;
readAsDataURL(blob: Blob): void;
readAsText(blob: Blob, encoding?: string): void;
removeEventListener<K extends keyof FileReaderEventMap>(
type: K,
listener: (this: FileReader, ev: FileReaderEventMap[K]) => any,
options?: boolean | EventListenerOptions,
): void;
removeEventListener(
type: string,
options?: boolean | EventListenerOptions,
): void;
}
var FileReader: {
prototype: FileReader;
readonly DONE: number;
readonly EMPTY: number;
readonly LOADING: number;
new (): FileReader;
};

Extends

Properties

readonly DONE: number
readonly EMPTY: number
readonly error: DOMException | null
readonly LOADING: number
onabort: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null
onerror: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null
onload: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null
onloadend: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null
onloadstart: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null
onprogress: ((this: FileReader, ev: ProgressEvent<FileReader>) => any) | null
readonly readyState: number
readonly result: string | ArrayBuffer | null

Methods

abort(): void
addEventListener<K extends keyof FileReaderEventMap>(
type: K,
listener: (this: FileReader, ev: FileReaderEventMap[K]) => any,
options?: boolean | AddEventListenerOptions,
): void
addEventListener(
type: string,
options?: boolean | AddEventListenerOptions,
): void
readAsArrayBuffer(blob: Blob): void
readAsBinaryString(blob: Blob): void
readAsDataURL(blob: Blob): void
readAsText(blob: Blob, encoding?: string): void
removeEventListener<K extends keyof FileReaderEventMap>(
type: K,
listener: (this: FileReader, ev: FileReaderEventMap[K]) => any,
options?: boolean | EventListenerOptions,
): void
removeEventListener(
type: string,
options?: boolean | EventListenerOptions,
): void

© 2018–2021 the Deno authors
https://doc.deno.land/deno/stable/~/FileReader