本文实例讲述了js获取及判断键盘按键的方法。分享给大家供大家参考，具体如下：
js 里面的键盘事件经常用到，所以收集了键盘事件对应的键码来分享下：
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keyCode 8 = BackSpace BackSpace
keyCode 9 = Tab Tab
keyCode 12 = Clear
keyCode 13 = Enter
keyCode 16 = Shift_L
keyCode 17 = Control_L
keyCode 18 = Alt_L
keyCode 19 = Pause
keyCode 20 = Caps_Lock
keyCode 27 = Escape Escape
keyCode 32 = space
keyCode 33 = Prior
keyCode 34 = Next
keyCode 35 = End
keyCode 36 = Home
keyCode 37 = Left
keyCode 38 = Up
keyCode 39 = Right
keyCode 40 = Down
keyCode 41 = Select
keyCode 42 = Print
keyCode 43 = Execute
keyCode 45 = Insert
keyCode 46 = Delete
keyCode 47 = Help
keyCode 48 = 0 equal braceright
keyCode 49 = 1 exclam onesuperior
keyCode 50 = 2 quotedbl twosuperior
keyCode 51 = 3 section threesuperior
keyCode 52 = 4 dollar
keyCode 53 = 5 percent
keyCode 54 = 6 ampersand
keyCode 55 = 7 slash braceleft
keyCode 56 = 8 parenleft bracketleft
keyCode 57 = 9 parenright bracketright
keyCode 65 = a A
keyCode 66 = b B
keyCode 67 = c C
keyCode 68 = d D
keyCode 69 = e E EuroSign
keyCode 70 = f F
keyCode 71 = g G
keyCode 72 = h H
keyCode 73 = i I
keyCode 74 = j J
keyCode 75 = k K
keyCode 76 = l L
keyCode 77 = m M mu
keyCode 78 = n N
keyCode 79 = o O
keyCode 80 = p P
keyCode 81 = q Q at
keyCode 82 = r R
keyCode 83 = s S
keyCode 84 = t T
keyCode 85 = u U
keyCode 86 = v V
keyCode 87 = w W
keyCode 88 = x X
keyCode 89 = y Y
keyCode 90 = z Z
keyCode 96 = KP_0 KP_0
keyCode 97 = KP_1 KP_1
keyCode 98 = KP_2 KP_2
keyCode 99 = KP_3 KP_3
keyCode 100 = KP_4 KP_4
keyCode 101 = KP_5 KP_5
keyCode 102 = KP_6 KP_6
keyCode 103 = KP_7 KP_7
keyCode 104 = KP_8 KP_8
keyCode 105 = KP_9 KP_9
keyCode 106 = KP_Multiply KP_Multiply
keyCode 107 = KP_Add KP_Add
keyCode 108 = KP_Separator KP_Separator
keyCode 109 = KP_Subtract KP_Subtract
keyCode 110 = KP_Decimal KP_Decimal
keyCode 111 = KP_Divide KP_Divide
keyCode 112 = F1
keyCode 113 = F2
keyCode 114 = F3
keyCode 115 = F4
keyCode 116 = F5
keyCode 117 = F6
keyCode 118 = F7
keyCode 119 = F8
keyCode 120 = F9
keyCode 121 = F10
keyCode 122 = F11
keyCode 123 = F12
keyCode 124 = F13
keyCode 125 = F14
keyCode 126 = F15
keyCode 127 = F16
keyCode 128 = F17
keyCode 129 = F18
keyCode 130 = F19
keyCode 131 = F20
keyCode 132 = F21
keyCode 133 = F22
keyCode 134 = F23
keyCode 135 = F24
keyCode 136 = Num_Lock
keyCode 137 = Scroll_Lock
keyCode 187 = acute grave
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