Try Documentalist,
my app that offers fast, offline access to 190+ programmer API docs.
Links
FileReader
event handlers:
onloadstart
onprogress
onloadend : failure or success
onload : on success, (evt) => { evt.target.result is the data }
onabort
onerror
methods
abort
readAsArrayBuffer : result will be ArrayBuffer
readAsBinaryString : result will be binary data as string
readAsDataURL : result will be data: URL
readAsText : result will be content as string