void abort(); 

void readAsBinaryString(
    in Blob fileBlob); 

void readAsDataURL(
    in File file); 

void readAsText(
    in Blob fileBlob,
    in DOMString encoding); 

const unsigned short DONE = 2; 

const unsigned short EMPTY = 0; 

readonly attribute FileError error; 

const unsigned short LOADING = 1; 

attribute EventListener onabort; 

attribute EventListener onerror; 

attribute EventListener onload; 

attribute EventListener onloadend; 

attribute EventListener onloadstart; 

attribute EventListener onprogress; 

readonly attribute unsigned short readyState; 

readonly attribute DOMString result;