TypeScript
HTML
<div id="app"></div>
TypeScript
var map = {}
var count = 0
onkeydown = onkeyup = function(e){
console.log('e', e)
console.log('==', Object.keys(map))
if(e.type == 'keyup'){
map = {}
}
/* e.preventDefault();
map[e.keyCode] = e.type == 'keydown';
console.log('==', Object.keys(map).length)
Object.keys(map).forEach((key, index) => {
console.log(index+' key', key)
}); */
}