Chrome 10：KeyEvent或类似于Firefox的KeyEvent

问题描述

|| 在Firefox 3.6和4.0中，我可以将

KeyboardEvent

\'1ѭ与存储在全局compare2ѭ对象（这是DOM3规范的一部分）中的键的预定义常量进行比较。在Chrome 10.0中，ѭ2不是全局对象。有没有一种方法可以在Chrome 10.0中访问带有预定义键常量的对象？甚至实现了吗？ 例：

// This works in firefox 3/4.
// How do I do this in chrome?
if (event.keyCode === KeyEvent.DOM_VK_RETURN) {
    // Do stuff...
} else if (event.keyCode === KeyEvent.DOM_VK_ESCAPE) {
    // Do something else.
}

是的，我知道输入/返回键代码为13，转义键代码为27。     

解决方法

据我所知，Chrome本身并不具备此功能，但您可以另外定义它：

if (typeof KeyEvent == \"undefined\") {
    var KeyEvent = {
        DOM_VK_CANCEL: 3,DOM_VK_HELP: 6,DOM_VK_BACK_SPACE: 8,DOM_VK_TAB: 9,DOM_VK_CLEAR: 12,DOM_VK_RETURN: 13,DOM_VK_ENTER: 14,DOM_VK_SHIFT: 16,DOM_VK_CONTROL: 17,DOM_VK_ALT: 18,DOM_VK_PAUSE: 19,DOM_VK_CAPS_LOCK: 20,DOM_VK_ESCAPE: 27,DOM_VK_SPACE: 32,DOM_VK_PAGE_UP: 33,DOM_VK_PAGE_DOWN: 34,DOM_VK_END: 35,DOM_VK_HOME: 36,DOM_VK_LEFT: 37,DOM_VK_UP: 38,DOM_VK_RIGHT: 39,DOM_VK_DOWN: 40,DOM_VK_PRINTSCREEN: 44,DOM_VK_INSERT: 45,DOM_VK_DELETE: 46,DOM_VK_0: 48,DOM_VK_1: 49,DOM_VK_2: 50,DOM_VK_3: 51,DOM_VK_4: 52,DOM_VK_5: 53,DOM_VK_6: 54,DOM_VK_7: 55,DOM_VK_8: 56,DOM_VK_9: 57,DOM_VK_SEMICOLON: 59,DOM_VK_EQUALS: 61,DOM_VK_A: 65,DOM_VK_B: 66,DOM_VK_C: 67,DOM_VK_D: 68,DOM_VK_E: 69,DOM_VK_F: 70,DOM_VK_G: 71,DOM_VK_H: 72,DOM_VK_I: 73,DOM_VK_J: 74,DOM_VK_K: 75,DOM_VK_L: 76,DOM_VK_M: 77,DOM_VK_N: 78,DOM_VK_O: 79,DOM_VK_P: 80,DOM_VK_Q: 81,DOM_VK_R: 82,DOM_VK_S: 83,DOM_VK_T: 84,DOM_VK_U: 85,DOM_VK_V: 86,DOM_VK_W: 87,DOM_VK_X: 88,DOM_VK_Y: 89,DOM_VK_Z: 90,DOM_VK_CONTEXT_MENU: 93,DOM_VK_NUMPAD0: 96,DOM_VK_NUMPAD1: 97,DOM_VK_NUMPAD2: 98,DOM_VK_NUMPAD3: 99,DOM_VK_NUMPAD4: 100,DOM_VK_NUMPAD5: 101,DOM_VK_NUMPAD6: 102,DOM_VK_NUMPAD7: 103,DOM_VK_NUMPAD8: 104,DOM_VK_NUMPAD9: 105,DOM_VK_MULTIPLY: 106,DOM_VK_ADD: 107,DOM_VK_SEPARATOR: 108,DOM_VK_SUBTRACT: 109,DOM_VK_DECIMAL: 110,DOM_VK_DIVIDE: 111,DOM_VK_F1: 112,DOM_VK_F2: 113,DOM_VK_F3: 114,DOM_VK_F4: 115,DOM_VK_F5: 116,DOM_VK_F6: 117,DOM_VK_F7: 118,DOM_VK_F8: 119,DOM_VK_F9: 120,DOM_VK_F10: 121,DOM_VK_F11: 122,DOM_VK_F12: 123,DOM_VK_F13: 124,DOM_VK_F14: 125,DOM_VK_F15: 126,DOM_VK_F16: 127,DOM_VK_F17: 128,DOM_VK_F18: 129,DOM_VK_F19: 130,DOM_VK_F20: 131,DOM_VK_F21: 132,DOM_VK_F22: 133,DOM_VK_F23: 134,DOM_VK_F24: 135,DOM_VK_NUM_LOCK: 144,DOM_VK_SCROLL_LOCK: 145,DOM_VK_COMMA: 188,DOM_VK_PERIOD: 190,DOM_VK_SLASH: 191,DOM_VK_BACK_QUOTE: 192,DOM_VK_OPEN_BRACKET: 219,DOM_VK_BACK_SLASH: 220,DOM_VK_CLOSE_BRACKET: 221,DOM_VK_QUOTE: 222,DOM_VK_META: 224
    };
}