JavaScript兩鍵同時按下

Question

如何在鍵盤上按兩個鍵的同時得到兩個代碼？

在這裏面，我只得到一個鍵代碼...

document.onkeydown = function(e) 
{ var key = e.keyCode ? e.keyCode : e.which; 
    text.innerHTML += key; };    

Answer 1

這裏看看JavaScript multiple keys pressed at once

http://jsfiddle.net/vor0nwe/mkHsU/

zsvar log = $('#log')[0], 
    pressedKeys = []; 

$(document.body).keydown(function (evt) { 
    var li = pressedKeys[evt.keyCode]; 
    if (!li) { 
     li = log.appendChild(document.createElement('li')); 
     pressedKeys[evt.keyCode] = li; 
    } 
    $(li).text('Down: ' + evt.keyCode); 
    $(li).removeClass('key-up'); 
}); 

$(document.body).keyup(function (evt) { 
    var li = pressedKeys[evt.keyCode]; 
    if (!li) { 
     li = log.appendChild(document.createElement('li')); 
    } 
    $(li).text('Up: ' + evt.keyCode); 
    $(li).addClass('key-up'); 
});