使用jQuery,如何确定绑定到keypress事件时按下了哪个键?
$('#searchbox input').bind('keypress', function(e) {});
我想在ENTER按下时触发提交。
[更新]
即使我找到了(或者更好:一个)自己回答,似乎还有一些变化的空间;)
有没有之间的差异keyCode
和which
-尤其是如果我只是在寻找ENTER,这永远不会是一个unicode关键?
有些浏览器提供一种属性,而其他浏览器提供另一种属性吗?
使用jQuery,如何确定绑定到keypress事件时按下了哪个键?
$('#searchbox input').bind('keypress', function(e) {});
我想在ENTER按下时触发提交。
[更新]
即使我找到了(或者更好:一个)自己回答,似乎还有一些变化的空间;)
有没有之间的差异keyCode
和which
-尤其是如果我只是在寻找ENTER,这永远不会是一个unicode关键?
有些浏览器提供一种属性,而其他浏览器提供另一种属性吗?
Answers:
其实这更好:
var code = e.keyCode || e.which;
if(code == 13) { //Enter keycode
//Do something
}
e.which
。
e.which
未设置(保持0
),但设置e.keyCode
为(9
)。请参阅stackoverflow.com/questions/4793233/…为什么如此重要。
尝试这个
$('#searchbox input').bind('keypress', function(e) {
if(e.keyCode==13){
// Enter pressed... do anything here...
}
});
如果您使用的是jQuery UI,则可以翻译常见的键代码。在ui / ui / ui.core.js中:
$.ui.keyCode = {
...
ENTER: 13,
...
};
在tests / simulate / jquery.simulate.js中也有一些翻译,但是我在核心JS库中找不到任何翻译。请注意,我只是参考了来源。也许还有其他方法可以摆脱这些魔术数字。
您还可以使用String.charCodeAt和.fromCharCode:
>>> String.charCodeAt('\r') == 13
true
>>> String.fromCharCode(13) == '\r'
true
Uncaught TypeError: String.charCodeAt is not a function
我想您是想说'\r'.charCodeAt(0) == 13
假设您使用的是jQuery,则应绝对使用.which。是的,不同的浏览器设置了不同的属性,但是jQuery将对其进行规范化并分别设置.which值。请参阅http://api.jquery.com/keydown/上的文档,其中指出:
为了确定按下了哪个键,我们可以检查传递给处理函数的事件对象。虽然浏览器使用不同的属性来存储此信息,但jQuery规范化了.which属性,因此我们可以可靠地使用它来检索键码。
编辑:这仅适用于IE ...
我意识到这是一个过时的帖子,但是有人可能会觉得有用。
键事件是映射的,因此除了使用键代码值之外,您还可以使用键值使它更具可读性。
$(document).ready( function() {
$('#searchbox input').keydown(function(e)
{
setTimeout(function ()
{
//rather than using keyup, you can use keydown to capture
//the input as it's being typed.
//You may need to use a timeout in order to allow the input to be updated
}, 5);
});
if(e.key == "Enter")
{
//Enter key was pressed, do stuff
}else if(e.key == "Spacebar")
{
//Spacebar was pressed, do stuff
}
});
这是一份备忘单,其中包含我从此博客获得的映射密钥
e.key
财产。
// in jquery source code...
if (!event.which && ((event.charCode || event.charCode === 0) ? event.charCode : event.keyCode)) {
event.which = event.charCode || event.keyCode;
}
// So you have just to use
$('#searchbox input').bind('keypress', function(e) {
if (e.which === 13) {
alert('ENTER WAS PRESSED');
}
});
event.which
。
检出出色的jquery.hotkeys插件,它支持组合键:
$(document).bind('keydown', 'ctrl+c', fn);
$(document).ready(function(){
$("#btnSubmit").bind("click",function(){$('#'+'<%=btnUpload.ClientID %>').trigger("click");return false;});
$("body, input, textarea").keypress(function(e){
if(e.which==13) $("#btnSubmit").click();
});
});
希望这对您有帮助!!!
这几乎是keyCodes的完整列表:
3: "break",
8: "backspace / delete",
9: "tab",
12: 'clear',
13: "enter",
16: "shift",
17: "ctrl",
18: "alt",
19: "pause/break",
20: "caps lock",
27: "escape",
28: "conversion",
29: "non-conversion",
32: "spacebar",
33: "page up",
34: "page down",
35: "end",
36: "home ",
37: "left arrow ",
38: "up arrow ",
39: "right arrow",
40: "down arrow ",
41: "select",
42: "print",
43: "execute",
44: "Print Screen",
45: "insert ",
46: "delete",
48: "0",
49: "1",
50: "2",
51: "3",
52: "4",
53: "5",
54: "6",
55: "7",
56: "8",
57: "9",
58: ":",
59: "semicolon (firefox), equals",
60: "<",
61: "equals (firefox)",
63: "ß",
64: "@ (firefox)",
65: "a",
66: "b",
67: "c",
68: "d",
69: "e",
70: "f",
71: "g",
72: "h",
73: "i",
74: "j",
75: "k",
76: "l",
77: "m",
78: "n",
79: "o",
80: "p",
81: "q",
82: "r",
83: "s",
84: "t",
85: "u",
86: "v",
87: "w",
88: "x",
89: "y",
90: "z",
91: "Windows Key / Left ⌘ / Chromebook Search key",
92: "right window key ",
93: "Windows Menu / Right ⌘",
96: "numpad 0 ",
97: "numpad 1 ",
98: "numpad 2 ",
99: "numpad 3 ",
100: "numpad 4 ",
101: "numpad 5 ",
102: "numpad 6 ",
103: "numpad 7 ",
104: "numpad 8 ",
105: "numpad 9 ",
106: "multiply ",
107: "add",
108: "numpad period (firefox)",
109: "subtract ",
110: "decimal point",
111: "divide ",
112: "f1 ",
113: "f2 ",
114: "f3 ",
115: "f4 ",
116: "f5 ",
117: "f6 ",
118: "f7 ",
119: "f8 ",
120: "f9 ",
121: "f10",
122: "f11",
123: "f12",
124: "f13",
125: "f14",
126: "f15",
127: "f16",
128: "f17",
129: "f18",
130: "f19",
131: "f20",
132: "f21",
133: "f22",
134: "f23",
135: "f24",
144: "num lock ",
145: "scroll lock",
160: "^",
161: '!',
163: "#",
164: '$',
165: 'ù',
166: "page backward",
167: "page forward",
169: "closing paren (AZERTY)",
170: '*',
171: "~ + * key",
173: "minus (firefox), mute/unmute",
174: "decrease volume level",
175: "increase volume level",
176: "next",
177: "previous",
178: "stop",
179: "play/pause",
180: "e-mail",
181: "mute/unmute (firefox)",
182: "decrease volume level (firefox)",
183: "increase volume level (firefox)",
186: "semi-colon / ñ",
187: "equal sign ",
188: "comma",
189: "dash ",
190: "period ",
191: "forward slash / ç",
192: "grave accent / ñ / æ",
193: "?, / or °",
194: "numpad period (chrome)",
219: "open bracket ",
220: "back slash ",
221: "close bracket / å",
222: "single quote / ø",
223: "`",
224: "left or right ⌘ key (firefox)",
225: "altgr",
226: "< /git >",
230: "GNOME Compose Key",
231: "ç",
233: "XF86Forward",
234: "XF86Back",
240: "alphanumeric",
242: "hiragana/katakana",
243: "half-width/full-width",
244: "kanji",
255: "toggle touchpad"
这是一个jQuery扩展,它将处理被按下的回车键。
(function ($) {
$.prototype.enterPressed = function (fn) {
$(this).keyup(function (e) {
if ((e.keyCode || e.which) == 13) {
fn();
}
});
};
}(jQuery || {}));
$("#myInput").enterPressed(function() {
//do something
});
一个有效的示例可以在这里找到 http://jsfiddle.net/EnjB3/8/
巫婆 ;)
/*
This code is for example. In real life you have plugins like :
https://code.google.com/p/jquery-utils/wiki/JqueryUtils
https://github.com/jeresig/jquery.hotkeys/blob/master/jquery.hotkeys.js
https://github.com/madrobby/keymaster
http://dmauro.github.io/Keypress/
http://api.jquery.com/keydown/
http://api.jquery.com/keypress/
*/
var event2key = {'97':'a', '98':'b', '99':'c', '100':'d', '101':'e', '102':'f', '103':'g', '104':'h', '105':'i', '106':'j', '107':'k', '108':'l', '109':'m', '110':'n', '111':'o', '112':'p', '113':'q', '114':'r', '115':'s', '116':'t', '117':'u', '118':'v', '119':'w', '120':'x', '121':'y', '122':'z', '37':'left', '39':'right', '38':'up', '40':'down', '13':'enter'};
var documentKeys = function(event) {
console.log(event.type, event.which, event.keyCode);
var keycode = event.which || event.keyCode; // par exemple : 112
var myKey = event2key[keycode]; // par exemple : 'p'
switch (myKey) {
case 'a':
$('div').css({
left: '+=50'
});
break;
case 'z':
$('div').css({
left: '-=50'
});
break;
default:
//console.log('keycode', keycode);
}
};
$(document).on('keydown keyup keypress', documentKeys);
event.key
和现代的JS!没有数字代码了。您可以直接检查密钥。例如"Enter"
,"LeftArrow"
,"r"
,或"R"
。
const input = document.getElementById("searchbox");
input.addEventListener("keypress", function onEvent(event) {
if (event.key === "Enter") {
// Submit
}
else if (event.key === "Q") {
// Play quacking duck sound, maybe...
}
});
一些浏览器使用keyCode,其他浏览器使用keyCode。如果您使用的是jQuery,则可以可靠地使用jQuery标准化的东西。其实,
$('#searchbox input').bind('keypress', function(e) {
if(e.keyCode==13){
}
});
根据Kilian的回答:
如果仅输入按键很重要:
<form action="javascript:alert('Enter');">
<input type=text value="press enter">
</form>
我最简单的方法是:
$("#element").keydown(function(event) {
if (event.keyCode == 13) {
localiza_cep(this.value);
}
});
event.which
代替event.keyCode
。从jQuery API:The event.which property normalizes event.keyCode and event.charCode. It is recommended to watch event.which for keyboard key input.
我刚刚制作了一个用于jQuery的插件,该插件使操作更轻松 keypress
事件。无需查找数字并将其放入,您所需要做的就是:
$(document).keydown(function(e) {
if (getPressedKey(e) == theKeyYouWantToFireAPressEventFor /*Add 'e.ctrlKey here to only fire if the combo is CTRL+theKeyYouWantToFireAPressEventFor'*/) {
// Your Code To Fire When You Press theKeyYouWantToFireAPressEventFor
}
});
就这么简单。请注意,theKeyYouWantToFireAPressEventFor
是不是一个数字,而是一个字符串(例如,"a"
当火A被按下时,"ctrl"
火灾时按下,或者,在一个号码,只的情况下,暂无报价。如果这将火被按下。)CTRL (control)1
1
因为长版本是如此……好……很长,我为此做了一个PasteBin链接:http ://pastebin.com/VUaDevz1
该event.keyCode
和event.which
被depracated。请参阅上面的@Gibolt答案或查看文档:https : //developer.mozilla.org/zh-CN/docs/Web/API/KeyboardEvent
event.key
应该代替
keypress
事件也被取消了:https:
//developer.mozilla.org/en-US/docs/Web/API/Document/keypress_event
尝试这个:
jQuery('#myInput').keypress(function(e) {
code = e.keyCode ? e.keyCode : e.which;
if(code.toString() == 13) {
alert('You pressed enter!');
}
});