1.keyup button that pops up when the trigger
document.onkeyup = function(){
console.log ( 'I bounced');
}
2.keydown triggered when the button is pressed to identify a function key such as Ctrl shift left or right arrow
document.addEventListener('keydown',function(){
console.log ( 'I pressed down');
})
3.keypress key is pressed when the trigger does not recognize the function keys such as Ctrl shift left or right arrow
document.addEventListener('keypress',function(){
console.log ( 'I pressed the keypress');
})
4. The order of execution of three events: keydown - - keypress - - keyup
The keyboard event object keyCode returns the ASCII value of the key
6.keydown keyup - insensitive and case-sensitive keypress
document.addEventListener('keydown',function(e){
if( e.keyCode === 65 ){
alert ( "pressed a key");
}else{
alert ( 'not pressed a button');
}
})