重置
横排
竖排
/
mdn2
/
en-US
/
docs
/
Web
/
API
/
FileReader
FileReader
abort
abort_event
error
error_event
FileReader
load_event
loadend_event
loadstart_event
progress_event
readAsArrayBuffer
readAsBinaryString
readAsDataURL
readAsText
readyState
result