- add types embed & iframe, both of those just support
- add ripple effect for button
- topbar and zoombar's animation like chrome ui
- add full screen and zoom out / in
- add roate button
- pagination
- loading
- can config using cdn or local pdf.js
- listen right mouse button
- two fingers zoom control in mac and ctrl + mouse roll control
- two modes: pagination control / show all and control with mouse roll
- annotion ==> mark, underscore, box-line
- the style of scroll bar
- when click full screen in max height, hide topbar , do not hide zoombar
- dowload modal. No directly downlaod
- external api