在监听键盘事件时，我们经常需要检查常见的键值。Vue 允许为 v-on 在监听键盘事件时添加按键修饰符：
JS部分：
1 Vue.config.keyCodes = {
2 f2:113,
3 }
4 var app = new Vue({
5 el: "#app",
6 data() {
7 return {
8 msg: "我是谁，我从哪里来，我又要往哪里去"
9 }
10 },
11 methods:{
12 submit(){
13 console.log("你按了回车键");
14 },
15 f2submit(){
16 console.log("你按了f2键");
17 }
18 }
19 });
HTML部分：
1 <div id="app">
2 <p><input type="text" placeholder="回车可提交" @keyup.enter="submit"></p>
3 <p><input type="text" placeholder="f2可提交" @keyup.f2="f2submit"></p>
4 </div>
结果：
Vue内置的按键名：
.enter.tab.delete(捕获“删除”和“退格”键).esc.space.up.down.left.right
keyCode列表：
1 keycode 0 = 2 keycode 1 = 3 keycode 2 = 4 keycode 3 = 5 keycode 4 = 6 keycode 5 = 7 keycode 6 = 8 keycode 7 = 9 keycode 8 = BackSpace 10 keycode 9 = Tab 11 keycode 10 = 12 keycode 11 = 13 keycode 12 = Clear 14 keycode 13 = Enter 15 keycode 14 = 16 keycode 15 = 17 keycode 16 = Shift_L 18 keycode 17 = Control_L 19 keycode 18 = Alt_L 20 keycode 19 = Pause 21 keycode 20 = Caps_Lock 22 keycode 21 = 23 keycode 22 = 24 keycode 23 = 25 keycode 24 = 26 keycode 25 = 27 keycode 26 = 28 keycode 27 = Esc Escape 29 keycode 28 = 30 keycode 29 = 31 keycode 30 = 32 keycode 31 = 33 keycode 32 = Space 34 keycode 33 = Page Up 35 keycode 34 = Page Down 36 keycode 35 = End 37 keycode 36 = Home 38 keycode 37 = Left Arrow 39 keycode 38 = Up Arrow 40 keycode 39 = Right Arrow 41 keycode 40 = Down Arrow 42 keycode 41 = Select 43 keycode 42 = Print 44 keycode 43 = Execute 45 keycode 44 = 46 keycode 45 = Insert 47 keycode 46 = Delete 48 keycode 47 = Help 49 keycode 48 = 0 ) 50 keycode 49 = 1 ! 51 keycode 50 = 2 @ 52 keycode 51 = 3 # 53 keycode 52 = 4 $ 54 keycode 53 = 5 % 55 keycode 54 = 6 ^ 56 keycode 55 = 7 & 57 keycode 56 = 8 * 58 keycode 57 = 9 ( 59 keycode 58 = 60 keycode 59 = 61 keycode 60 = 62 keycode 61 = 63 keycode 62 = 64 keycode 63 = 65 keycode 64 = 66 keycode 65 = a A 67 keycode 66 = b B 68 keycode 67 = c C 69 keycode 68 = d D 70 keycode 69 = e E 71 keycode 70 = f F 72 keycode 71 = g G 73 keycode 72 = h H 74 keycode 73 = i I 75 keycode 74 = j J 76 keycode 75 = k K 77 keycode 76 = l L 78 keycode 77 = m M 79 keycode 78 = n N 80 keycode 79 = o O 81 keycode 80 = p P 82 keycode 81 = q Q 83 keycode 82 = r R 84 keycode 83 = s S 85 keycode 84 = t T 86 keycode 85 = u U 87 keycode 86 = v V 88 keycode 87 = w W 89 keycode 88 = x X 90 keycode 89 = y Y 91 keycode 90 = z Z 92 keycode 91 = 93 keycode 92 = 94 keycode 93 = 95 keycode 94 = 96 keycode 95 = 97 keycode 96 = KP_0 98 keycode 97 = KP_1 99 keycode 98 = KP_2 100 keycode 99 = KP_3 101 keycode 100 = KP_4 102 keycode 101 = KP_5 103 keycode 102 = KP_6 104 keycode 103 = KP_7 105 keycode 104 = KP_8 106 keycode 105 = KP_9 107 keycode 106 = KP_* KP_Multiply 108 keycode 107 = KP_+ KP_Add 109 keycode 108 = KP_Enter KP_Separator 110 keycode 109 = KP_- KP_Subtract 111 keycode 110 = KP_. KP_Decimal 112 keycode 111 = KP_/ KP_Divide 113 keycode 112 = F1 114 keycode 113 = F2 115 keycode 114 = F3 116 keycode 115 = F4 117 keycode 116 = F5 118 keycode 117 = F6 119 keycode 118 = F7 120 keycode 119 = F8 121 keycode 120 = F9 122 keycode 121 = F10 123 keycode 122 = F11 124 keycode 123 = F12 125 keycode 124 = F13 126 keycode 125 = F14 127 keycode 126 = F15 128 keycode 127 = F16 129 keycode 128 = F17 130 keycode 129 = F18 131 keycode 130 = F19 132 keycode 131 = F20 133 keycode 132 = F21 134 keycode 133 = F22 135 keycode 134 = F23 136 keycode 135 = F24 137 keycode 136 = Num_Lock 138 keycode 137 = Scroll_Lock 139 keycode 138 = 140 keycode 139 = 141 keycode 140 = 142 keycode 141 = 143 keycode 142 = 144 keycode 143 = 145 keycode 144 = 146 keycode 145 = 147 keycode 146 = 148 keycode 147 = 149 keycode 148 = 150 keycode 149 = 151 keycode 150 = 152 keycode 151 = 153 keycode 152 = 154 keycode 153 = 155 keycode 154 = 156 keycode 155 = 157 keycode 156 = 158 keycode 157 = 159 keycode 158 = 160 keycode 159 = 161 keycode 160 = 162 keycode 161 = 163 keycode 162 = 164 keycode 163 = 165 keycode 164 = 166 keycode 165 = 167 keycode 166 = 168 keycode 167 = 169 keycode 168 = 170 keycode 169 = 171 keycode 170 = 172 keycode 171 = 173 keycode 172 = 174 keycode 173 = 175 keycode 174 = 176 keycode 175 = 177 keycode 176 = 178 keycode 177 = 179 keycode 178 = 180 keycode 179 = 181 keycode 180 = 182 keycode 181 = 183 keycode 182 = 184 keycode 183 = 185 keycode 184 = 186 keycode 185 = 187 keycode 186 = 188 keycode 187 = =+ 189 keycode 188 = ,< 190 keycode 189 = -_ 191 keycode 190 = .> 192 keycode 191 = /? 193 keycode 192 = `~ 194 keycode 193 = 195 keycode 194 = 196 keycode 195 = 197 keycode 196 = 198 keycode 197 = 199 keycode 198 = 200 keycode 199 = 201 keycode 200 = 202 keycode 201 = 203 keycode 202 = 204 keycode 203 = 205 keycode 204 = 206 keycode 205 = 207 keycode 206 = 208 keycode 207 = 209 keycode 208 = 210 keycode 209 = 211 keycode 210 = plusminus hyphen macron 212 keycode 211 = 213 keycode 212 = copyright registered 214 keycode 213 = guillemotleft guillemotright 215 keycode 214 = masculine ordfeminine 216 keycode 215 = ae AE 217 keycode 216 = cent yen 218 keycode 217 = questiondown exclamdown 219 keycode 218 = onequarter onehalf threequarters 220 keycode 219 = [{ 221 keycode 220 = | 222 keycode 221 = ]} 223 keycode 222 = '" 224 225 keycode 223 = 226 keycode 224 = 227 keycode 225 = 228 keycode 226 = 229 keycode 227 = multiply division 230 keycode 228 = acircumflex Acircumflex 231 keycode 229 = ecircumflex Ecircumflex 232 keycode 230 = icircumflex Icircumflex 233 keycode 231 = ocircumflex Ocircumflex 234 keycode 232 = ucircumflex Ucircumflex 235 keycode 233 = ntilde Ntilde 236 keycode 234 = yacute Yacute 237 keycode 235 = oslash Ooblique 238 keycode 236 = aring Aring 239 keycode 237 = ccedilla Ccedilla 240 keycode 238 = thorn THORN 241 keycode 239 = eth ETH 242 keycode 240 = diaeresis cedilla currency 243 keycode 241 = agrave Agrave atilde Atilde 244 keycode 242 = egrave Egrave 245 keycode 243 = igrave Igrave 246 keycode 244 = ograve Ograve otilde Otilde 247 keycode 245 = ugrave Ugrave 248 keycode 246 = adiaeresis Adiaeresis 249 keycode 247 = ediaeresis Ediaeresis 250 keycode 248 = idiaeresis Idiaeresis 251 keycode 249 = odiaeresis Odiaeresis 252 keycode 250 = udiaeresis Udiaeresis 253 keycode 251 = ssharp question backslash 254 keycode 252 = asciicircum degree 255 keycode 253 = 3 sterling 256 keycode 254 = Mode_switch