jQuery 2.1.0, HTML, CSS, JavaScript
jQuery 1.9.1, HTML, CSS, JavaScript
https://stackoverflow.com/questions/44225867/divs-with-vw-are-overlapping#
No-Library (pure JS), HTML, CSS, JavaScript
jQuery 2.2.4, HTML, CSS, JavaScript
keydown, keypress, keyup events are able to be triggered without actual input. Even if trigger keypress with keycode of 65('a'), no value appears in textbox.