Javascript中的Keylistener [英] Keylistener in Javascript

问题描述

我正在寻找一个用JavaScript开发的游戏的关键监听器。我不知道这在实际代码中是如何工作的，但它会是这样的。

I'm looking for a key listener for a game I'm developing in JavaScript. I have no idea how this would work in real code but it would be somthing like this.

    if(keyPress=upKey)
     {
      playerSpriteX+=10;

     }
    else if(keyPress=downKey)
     {
      playerSpriteY-=10;

     } 

等...

我搜索了一下，Google提出了涉及AJAX的内容，我还不明白。在javascript中有内置函数吗？

I searched it up, and Google came up with things that involved AJAX which I don't understand yet. Is there a built in function in javascript that does this?

推荐答案

window.onkeyup = function(e) {
   var key = e.keyCode ? e.keyCode : e.which;

   if (key == 38) {
       playerSpriteX += 10;
   }else if (key == 40) {
       playerSpriteX -= 10;
   }
}

FIDDLE

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