[英]Are Up, Down, Left, Right Arrow KeyCodes always the same?
As the title suggests, in my code I use the following codes: 正如标题所示,在我的代码中我使用以下代码:
And check for those key codes to determine my action. 并检查这些关键代码以确定我的行动。 My question is, do those always remain the same?
我的问题是,那些总是保持不变吗? If I were to use a DVORAK keyboard, or a non-English keyboard, would those key codes remain the same?
如果我使用DVORAK键盘或非英语键盘,这些键码是否保持不变?
Along the same line, is there a preferred method for detecting those keystrokes? 沿着同一条线,是否有一种检测这些击键的首选方法?
Currently, I do it as follows: 目前,我这样做:
var Key = {
_pressed: {},
LEFT: 37,
UP: 38,
RIGHT: 39,
DOWN: 40,
isDown: function (keyCode) {
return this._pressed[keyCode];
},
onKeydown: function (event) {
this._pressed[event.keyCode] = true;
if (Key.isDown(Key.UP))
//do up action
else if (Key.isDown(Key.DOWN)) {
//do down action
}
delete this._pressed[event.keyCode];
}
};
Yes, arrow key keycodes are always the same, regardless of the keyboard layout. 是的,无论键盘布局如何,箭头键键代码始终相同。
I regularly use different keyboard layouts (Dvorak, Russian, Ukrainian, Hebrew, Spanish) and I have tried all of them in JavaScript and they give consistent results for the arrow keys. 我经常使用不同的键盘布局(Dvorak,俄语,乌克兰语,希伯来语,西班牙语),我已经在JavaScript中尝试了所有这些,并且它们为箭头键提供了一致的结果。
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