WebIDLpedia

Definition

File API defines FileReader

[Exposed=(Window,Worker)]
interface FileReader: EventTarget {
  constructor();
  // async read methods
  undefined readAsArrayBuffer(Blob blob);
  undefined readAsBinaryString(Blob blob);
  undefined readAsText(Blob blob, optional DOMString encoding);
  undefined readAsDataURL(Blob blob);

  undefined abort();

  // states
  const unsigned short EMPTY = 0;
  const unsigned short LOADING = 1;
  const unsigned short DONE = 2;

  readonly attribute unsigned short readyState;

  // File or Blob data
  readonly attribute (DOMString or ArrayBuffer)? result;

  readonly attribute DOMException? error;

  // event handler content attributes
  attribute EventHandler onloadstart;
  attribute EventHandler onprogress;
  attribute EventHandler onload;
  attribute EventHandler onabort;
  attribute EventHandler onerror;
  attribute EventHandler onloadend;
};

Methods and attributes that return objects implementing FileReader

• FileReader()