event 事件兼容性处理 keycode 大全

javascript判断是否按回车键

function enterHandler(event)
{
   var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
   if (keyCode == 13) {
    //处理函数
   }
}

1. keycode    8 = BackSpace BackSpace
2. keycode    9 = Tab Tab
3. keycode   12 = Clear
4. keycode   13 = Enter
5. keycode   16 = Shift_L
6. keycode   17 = Control_L
7. keycode   18 = Alt_L
8. keycode   19 = Pause
9. keycode   20 = Caps_Lock
10. keycode   27 = Escape Escape
11. keycode   32 = space space
12. keycode   33 = Prior
13. keycode   34 = Next
14. keycode   35 = End
15. keycode   36 = Home
16. keycode   37 = Left
17. keycode   38 = Up
18. keycode   39 = Right
19. keycode   40 = Down
20. keycode   41 = Select
21. keycode   42 = Print
22. keycode   43 = Execute
23. keycode   45 = Insert
24. keycode   46 = Delete
25. keycode   47 = Help
26. keycode   48 = 0 equal braceright
27. keycode   49 = 1 exclam onesuperior
28. keycode   50 = 2 quotedbl twosuperior
29. keycode   51 = 3 section threesuperior
30. keycode   52 = 4 dollar
31. keycode   53 = 5 percent
32. keycode   54 = 6 ampersand
33. keycode   55 = 7 slash braceleft
34. keycode   56 = 8 parenleft bracketleft
35. keycode   57 = 9 parenright bracketright
36. keycode   65 = a A
37. keycode   66 = b B
38. keycode   67 = c C
39. keycode   68 = d D
40. keycode   69 = e E EuroSign
41. keycode   70 = f F
42. keycode   71 = g G
43. keycode   72 = h H
44. keycode   73 = i I
45. keycode   74 = j J
46. keycode   75 = k K
47. keycode   76 = l L
48. keycode   77 = m M mu
49. keycode   78 = n N
50. keycode   79 = o O
51. keycode   80 = p P
52. keycode   81 = q Q at
53. keycode   82 = r R
54. keycode   83 = s S
55. keycode   84 = t T
56. keycode   85 = u U
57. keycode   86 = v V
58. keycode   87 = w W
59. keycode   88 = x X
60. keycode   89 = y Y
61. keycode   90 = z Z
62. keycode   96 = KP_0 KP_0
63. keycode   97 = KP_1 KP_1
64. keycode   98 = KP_2 KP_2
65. keycode   99 = KP_3 KP_3
66. keycode 100 = KP_4 KP_4
67. keycode 101 = KP_5 KP_5
68. keycode 102 = KP_6 KP_6
69. keycode 103 = KP_7 KP_7
70. keycode 104 = KP_8 KP_8
71. keycode 105 = KP_9 KP_9
72. keycode 106 = KP_Multiply KP_Multiply
73. keycode 107 = KP_Add KP_Add
74. keycode 108 = KP_Separator KP_Separator
75. keycode 109 = KP_Subtract KP_Subtract
76. keycode 110 = KP_Decimal KP_Decimal
77. keycode 111 = KP_Divide KP_Divide
78. keycode 112 = F1
79. keycode 113 = F2
80. keycode 114 = F3
81. keycode 115 = F4
82. keycode 116 = F5
83. keycode 117 = F6
84. keycode 118 = F7
85. keycode 119 = F8
86. keycode 120 = F9
87. keycode 121 = F10
88. keycode 122 = F11
89. keycode 123 = F12
90. keycode 124 = F13
91. keycode 125 = F14
92. keycode 126 = F15
93. keycode 127 = F16
94. keycode 128 = F17
95. keycode 129 = F18
96. keycode 130 = F19
97. keycode 131 = F20
98. keycode 132 = F21
99. keycode 133 = F22
100. keycode 134 = F23
101. keycode 135 = F24
102. keycode 136 = Num_Lock
103. keycode 137 = Scroll_Lock
104. keycode 187 = acute grave
105. keycode 188 = comma semicolon
106. keycode 189 = minus underscore
107. keycode 190 = period colon
108. keycode 192 = numbersign apostrophe
109. keycode 210 = plusminus hyphen macron
110. keycode 211 =
111. keycode 212 = copyright registered
112. keycode 213 = guillemotleft guillemotright
113. keycode 214 = masculine ordfeminine
114. keycode 215 = ae AE
115. keycode 216 = cent yen
116. keycode 217 = questiondown exclamdown
117. keycode 218 = onequarter onehalf threequarters
118. keycode 220 = less greater bar
119. keycode 221 = plus asterisk asciitilde
120. keycode 227 = multiply division
121. keycode 228 = acircumflex Acircumflex
122. keycode 229 = ecircumflex Ecircumflex
123. keycode 230 = icircumflex Icircumflex
124. keycode 231 = ocircumflex Ocircumflex
125. keycode 232 = ucircumflex Ucircumflex
126. keycode 233 = ntilde Ntilde
127. keycode 234 = yacute Yacute
128. keycode 235 = oslash Ooblique
129. keycode 236 = aring Aring
130. keycode 237 = ccedilla Ccedilla
131. keycode 238 = thorn THORN
132. keycode 239 = eth ETH
133. keycode 240 = diaeresis cedilla currency
134. keycode 241 = agrave Agrave atilde Atilde
135. keycode 242 = egrave Egrave
136. keycode 243 = igrave Igrave
137. keycode 244 = ograve Ograve otilde Otilde
138. keycode 245 = ugrave Ugrave
139. keycode 246 = adiaeresis Adiaeresis
140. keycode 247 = ediaeresis Ediaeresis
141. keycode 248 = idiaeresis Idiaeresis
142. keycode 249 = odiaeresis Odiaeresis
143. keycode 250 = udiaeresis Udiaeresis
144. keycode 251 = ssharp question backslash
145. keycode 252 = asciicircum degree
146. keycode 253 = 3 sterling
147. keycode 254 = Mode_switch

 

字母和数字键的键码值(keyCode)
按键	键码	按键	键码	按键	键码	按键	键码
A	65	J	74	S	83	1	49
B	66	K	75	T	84	2	50
C	67	L	76	U	85	3	51
D	68	M	77	V	86	4	52
E	69	N	78	W	87	5	53
F	70	O	79	X	88	6	54
G	71	P	80	Y	89	7	55
H	72	Q	81	Z	90	8	56
I	73	R	82	0	48	9	57

数字键盘上的键的键码值(keyCode)				功能键键码值(keyCode)
按键	键码	按键	键码	按键	键码	按键	键码
0	96	8	104	F1	112	F7	118
1	97	9	105	F2	113	F8	119
2	98	*	106	F3	114	F9	120
3	99	+	107	F4	115	F10	121
4	100	Enter	108	F5	116	F11	122
5	101	-	109	F6	117	F12	123
6	102	.	110
7	103	/	111

 

控制键键码值(keyCode)
按键	键码	按键	键码	按键	键码	按键	键码
BackSpace	8	Esc	27	Right Arrow	39	-_	189
Tab	9	Spacebar	32	Down Arrow	40	.>	190
Clear	12	Page Up	33	Insert	45	/?	191
Enter	13	Page Down	34	Delete	46	`~	192
Shift	16	End	35	Num Lock	144	[{	219
Control	17	Home	36	;:	186	\|	220
Alt	18	Left Arrow	37	=+	187	]}	221
Cape Lock	20	Up Arrow	38	,<	188	'"	222

 

 

 

 

 

 

 

 

 

 

 

 

 keycode兼容性处理：

javascript判断是否按回车键

function enterHandler(event)
{
   var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
   if (keyCode == 13) {
    //处理函数
   }
}

event兼容性处理：

function myEventHandler(e) {

    // 注意参数e
    // 该函数调用的时候e是event对象（W3C实现）

    // 兼容IE的代码
    e = e || window.event;

    // 现在e就可以兼容各种浏览器了

}

Event对象，当事件发生的时候出发某个函数，该Event对象将自动在函数内可用，该对象包含了很多事件触发时候的信息，但IE却没有这么实现，而是自己实现的，IE浏览器是通过全局对象window下的event属性来包含这些信息

 

preventDefault兼容性处理：

function myEventHandler(e) {
    e = e || window.event;
    // 防止默认行为
    if (e.preventDefault) {
        e.preventDefault();
    } else {
        e.returnValue = false;
    }
}

阻止冒泡兼容性处理：

function myParagraphEventHandler(e) {

    e = e || window.event;

    // 停止向上冒泡
    if (e.stopPropagation) {
        // W3C实现  
        e.stopPropagation();
    } else {
        // IE实现  
        e.cancelBubble = true;
    }

}

e.target兼容性处理：

var target = event ? event.target : window.event.srcElement;

事件委托

举例来说，如果你有一个很多行的大表格，在每个<tr>上绑定点击事件是个非常危险的想法，因为性能是个大问题。流行的做法是使用事件委托。事件委托描述的是将事件绑定在容器元素上，然后通过判断点击的target子元素的类型来触发相应的事件。事件委托依赖于事件冒泡，如果事件冒泡到table之前被禁用的话，那么下面的代码就无法工作了。

var myTable = document.getElementById('my-table');

myTable.onclick = function () {

    // 处理浏览器兼容
    e = e || window.event;
    var targetNode = e.target || e.srcElement;

    // 测试如果点击的是TR就触发
    if (targetNode.nodeName.toLowerCase() === 'tr') {
        alert('You clicked a table row!');
    }

}

 

 关于W3C和微软模型还有其他的少许差异，比如this，在触发事件的时候函数中的this一般都是该元素上下文，，也就说this引用该元素自身，在基本事件注册和W3C模型中都没有问题，但在微软模型的实现里却可能出错，请参考如下代码：

function myEventHandler() {
    this.style.display = 'none';
}

// 正常工作，this是代表该元素
myIntro.onclick = myEventHandler;

// 正常工作，this是代表该元素
myIntro.addEventListener('click', myEventHandler, false);

// 不正常，这时候的this是代表Window对象
myIntro.attachEvent('onclick', myEventHandler);

获取鼠标点击按键

getButton : function(event){
    if(document.implementation.hasFeature("MouseEvents","2.0")){
        return event.button;
    }else{
          switch(event.button){
                case 0 :
                case 1 :
                case 3 :
                case 5 :
                case 7 :
                          return 0;
                case 2 :
                case 6 :
                          return 2;
                case 4 :
                          return 1;
            }
     }
} 

 

事件绑定：

1、简单实用版：     缺点：不能移除匿名处理函数事件                                                                                    

function bind(elm, evType, fn, useCapture) {
    if (elm.addEventListener) {
         elm.addEventListener(evType, fn, useCapture);//DOM2.0
        
    }else if (elm.attachEvent) {
        elm.attachEvent('on' + evType, function(){
               fn.call(elm,window.event);
       });//IE5+

    }else {
        elm['on' + evType] = fn;//DOM 0
    }
}

 

2、Dean Edwards版：                                                                                                   

给元素添加事件，在标准浏览器中使用addEventListener，而在IE中使用attachEvent，但是IE的attachEvent不支持捕获阶段的事件处理程序，并且同一个处理程序能添加多次，并且this指向错误。

Dean Edwards给出了一种不使用attachEvent添加事件处理程序的方法，解决了同一个处理程序可以添加多次的问题，并且修正了IE中event对象与标准浏览器中event对象的差别。

http://dean.edwards.name/weblog/2005/10/add-event/

function addEvent(element, type, handler) {
  // assign each event handler a unique ID
  if (!handler.$$guid) handler.$$guid = addEvent.guid++;
  // create a hash table of event types for the element
  if (!element.events) element.events = {};
  // create a hash table of event handlers for each element/event pair
  var handlers = element.events[type];
  if (!handlers) {
    handlers = element.events[type] = {};
    // store the existing event handler (if there is one)
    if (element["on" + type]) {
      handlers[0] = element["on" + type];
    }
  }
  // store the event handler in the hash table
  handlers[handler.$$guid] = handler;
  // assign a global event handler to do all the work
  element["on" + type] = handleEvent;
};
// a counter used to create unique IDs
addEvent.guid = 1;

function removeEvent(element, type, handler) {
  // delete the event handler from the hash table
  if (element.events && element.events[type]) {
    delete element.events[type][handler.$$guid];
  }
};

function handleEvent(event) {
  // grab the event object (IE uses a global event object)
  event = event || window.event;
  // get a reference to the hash table of event handlers
  var handlers = this.events[event.type];
  // execute each event handler
  for (var i in handlers) {
    this.$$handleEvent = handlers[i];
    this.$$handleEvent(event);
  }
};