HTML+JS 实现 input 框回车事件

1. Introduction

在程序猿的工作中，经常会遇见一些表单数据的提交，对于有表单的东西而言，input输入框是非常常见的，所以对于一些input的基本事件，我们需要去掌握。

很多时候input框我们输入结束后都习惯直接按回车，而不是点击button。在form表单中可以实现点击回车即可提交表单，但如果只是一个单独的input框，则无法通过直接按回车来提交内容。

2. Method

这种情况我们可以使用JavaScript脚本实现input框回车事件，其实现方法很简单，这里用到了jQuery框架，代码如下：只需要在script标签中直接加入以下内容即可。

$(document).ready(function () {
    $("input").keydown(function (event) {
        if (event.keyCode == 13) {
            //这里写事件，例如写个 a();
        }
    });
});

这里给出一个input框示例：

<input type="text" autocomplete="off" placeholder="请输入英文单词"></input>

keycode==13即代表按下了回车键，同理可以通过更改此代码实现其他按键的触发事件。

3. Appendix

下面是每个keycode的对应：

2 keyCode 8 = BackSpace BackSpace

3 keyCode 9 = Tab Tab

4 keyCode 12 = Clear

5 keyCode 13 = Enter

6 keyCode 16 = Shift_L

7 keyCode 17 = Control_L

8 keyCode 18 = Alt_L

9 keyCode 19 = Pause

10 keyCode 20 = Caps_Lock

11 keyCode 27 = Escape Escape

12 keyCode 32 = space

13 keyCode 33 = Prior

14 keyCode 34 = Next

15 keyCode 35 = End

16 keyCode 36 = Home

17 keyCode 37 = Left

18 keyCode 38 = Up

19 keyCode 39 = Right

20 keyCode 40 = Down

21 keyCode 41 = Select

22 keyCode 42 = Print

23 keyCode 43 = Execute

24 keyCode 45 = Insert

25 keyCode 46 = Delete

26 keyCode 47 = Help

27 keyCode 48 = 0 equal braceright

28 keyCode 49 = 1 exclam onesuperior

29 keyCode 50 = 2 quotedbl twosuperior

30 keyCode 51 = 3 section threesuperior

31 keyCode 52 = 4 dollar

32 keyCode 53 = 5 percent

33 keyCode 54 = 6 ampersand

34 keyCode 55 = 7 slash braceleft

35 keyCode 56 = 8 parenleft bracketleft

36 keyCode 57 = 9 parenright bracketright

37 keyCode 65 = a A

38 keyCode 66 = b B

39 keyCode 67 = c C

40 keyCode 68 = d D

41 keyCode 69 = e E EuroSign

42 keyCode 70 = f F

43 keyCode 71 = g G

44 keyCode 72 = h H

45 keyCode 73 = i I

46 keyCode 74 = j J

47 keyCode 75 = k K

48 keyCode 76 = l L

49 keyCode 77 = m M mu

50 keyCode 78 = n N

51 keyCode 79 = o O

52 keyCode 80 = p P

53 keyCode 81 = q Q at

54 keyCode 82 = r R

55 keyCode 83 = s S

56 keyCode 84 = t T

57 keyCode 85 = u U

58 keyCode 86 = v V

59 keyCode 87 = w W

60 keyCode 88 = x X

61 keyCode 89 = y Y

62 keyCode 90 = z Z

63 keyCode 96 = KP_0 KP_0

64 keyCode 97 = KP_1 KP_1

65 keyCode 98 = KP_2 KP_2

66 keyCode 99 = KP_3 KP_3

67 keyCode 100 = KP_4 KP_4

68 keyCode 101 = KP_5 KP_5

69 keyCode 102 = KP_6 KP_6

70 keyCode 103 = KP_7 KP_7

71 keyCode 104 = KP_8 KP_8

72 keyCode 105 = KP_9 KP_9

73 keyCode 106 = KP_Multiply KP_Multiply

74 keyCode 107 = KP_Add KP_Add

75 keyCode 108 = KP_Separator KP_Separator

76 keyCode 109 = KP_Subtract KP_Subtract

77 keyCode 110 = KP_Decimal KP_Decimal

78 keyCode 111 = KP_Divide KP_Divide

79 keyCode 112 = F1

80 keyCode 113 = F2

81 keyCode 114 = F3

82 keyCode 115 = F4

83 keyCode 116 = F5

84 keyCode 117 = F6

85 keyCode 118 = F7

86 keyCode 119 = F8

87 keyCode 120 = F9

88 keyCode 121 = F10

89 keyCode 122 = F11

90 keyCode 123 = F12

91 keyCode 124 = F13

92 keyCode 125 = F14

93 keyCode 126 = F15

94 keyCode 127 = F16

95 keyCode 128 = F17

96 keyCode 129 = F18

97 keyCode 130 = F19

98 keyCode 131 = F20

99 keyCode 132 = F21

100 keyCode 133 = F22

101 keyCode 134 = F23

102 keyCode 135 = F24

103 keyCode 136 = Num_Lock

104 keyCode 137 = Scroll_Lock

105 keyCode 187 = acute grave