javascript - jQuery Event Keypress：按下了哪个键？

Question

使用 jQuery，当我绑定到 keypress 事件时，如何找出按下了哪个键？

$('#searchbox input').bind('keypress', function(e) {});

我想在ENTER按下时触发提交。

[更新]

尽管我自己找到了（或更好的：一个）答案，但似乎还有一些变化的空间；）

keyCode和-之间有区别吗which- 特别是如果我只是在寻找ENTER, 永远不会是 unicode 键？

某些浏览器是否提供一种属性而其他浏览器提供另一种？

score 863 · Accepted Answer

其实这样更好：

 var code = e.keyCode || e.which;
 if(code == 13) { //Enter keycode
   //Do something
 }

score 136 · Accepted Answer

试试这个

$('#searchbox input').bind('keypress', function(e) {
    if(e.keyCode==13){
        // Enter pressed... do anything here...
    }
});

score 61 · Accepted Answer

如果您使用的是 jQuery UI，您可以翻译常用键码。在ui/ui/ui.core.js：

$.ui.keyCode = { 
    ...
    ENTER: 13, 
    ...
};

tests/simulate/jquery.simulate.js 中也有一些翻译，但我在核心 JS 库中找不到任何翻译。请注意，我只是grep'ed来源。也许还有其他方法可以摆脱这些神奇的数字。

您还可以使用 String.charCodeAt 和 .fromCharCode：

>>> String.charCodeAt('\r') == 13
true
>>> String.fromCharCode(13) == '\r'
true

score 41 · Accepted Answer

鉴于您使用的是 jQuery，您绝对应该使用 .which。是的，不同的浏览器设置了不同的属性，但是 jQuery 会对它们进行规范化并在每种情况下设置 .which 值。请参阅http://api.jquery.com/keydown/上的文档，它指出：

要确定按下了哪个键，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这些信息，但 jQuery 对 .which 属性进行了规范化，因此我们可以可靠地使用它来检索关键代码。

score 32 · Accepted Answer

...此示例阻止表单提交（通常是捕获击键 #13 时的基本意图）：

$('input#search').keypress(function(e) {
  if (e.which == '13') {
     e.preventDefault();
     doSomethingWith(this.value);
   }
});

score 28 · Accepted Answer

 // 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');
     }
 });

score 27 · Accepted Answer

编辑：这仅适用于 IE ...

我意识到这是一个旧帖子，但有人可能会觉得这很有用。

键事件是映射的，因此您也可以使用键值来使其更具可读性，而不是使用键代码值。

$(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
    }
});

这是我从这个博客获得的带有映射键的备忘单在此处输入图像描述

score 21 · Accepted Answer

21

查看支持组合键的优秀jquery.hotkeys 插件：

$(document).bind('keydown', 'ctrl+c', fn);

于 2010-07-20T19:21:19.353 回答

score 19 · Accepted Answer

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"

score 14 · Accepted Answer

$(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();
    });
});

希望这可以帮助你！！！

score 7 · Accepted Answer

好吧，我瞎了：

e.which

将包含密钥的 ASCII 码。

请参阅https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/which

score 7 · Accepted Answer

7

这是对各种浏览器行为的详细描述http://unixpapa.com/js/key.html

于 2010-03-05T17:41:17.123 回答

score 5 · Accepted Answer

我将用这一行补充解决方案代码e.preventDefault();。在表单的输入字段的情况下，我们不参加在输入按下时提交

var code = (e.keyCode ? e.keyCode : e.which);
 if(code == 13) { //Enter keycode
   e.preventDefault();
   //Do something
 }

score 5 · Accepted Answer

使用`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...
    }
});

Mozilla 文档

支持的浏览器

score 4 · Accepted Answer

添加隐藏提交，而不是隐藏类型，只需使用 style="display:none" 进行简单提交。这是一个示例（从代码中删除了不必要的属性）。

<form>
  <input type="text">
  <input type="submit" style="display:none">
</form>

它将本机接受输入键，不需要 JavaScript，适用于每个浏览器。

score 4 · Accepted Answer

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);

演示：http: //jsfiddle.net/molokoloco/hgXyq/24/

score 4 · Accepted Answer

这是一个 jquery 扩展，它将处理按下的回车键。

(function ($) {
    $.prototype.enterPressed = function (fn) {
        $(this).keyup(function (e) {
            if ((e.keyCode || e.which) == 13) {
                fn();
            }
        });
    };
}(jQuery || {}));

$("#myInput").enterPressed(function() {
    //do something
});

可以在这里找到一个工作示例 http://jsfiddle.net/EnjB3/8/

score 3 · Accepted Answer

$(document).bind('keypress', function (e) {
    console.log(e.which);  //or alert(e.which);

});

你应该有 firbug 才能在控制台中看到结果

score 3 · Accepted Answer

一些浏览器使用keyCode，其他浏览器使用keyCode。如果你使用 jQuery，你可以可靠地使用 which 作为 jQuery 标准化的东西。实际上，

$('#searchbox input').bind('keypress', function(e) {
    if(e.keyCode==13){

    }
});

score 2 · Accepted Answer

根据 Kilian 的回答：

如果只输入按键很重要：

<form action="javascript:alert('Enter');">
<input type=text value="press enter">
</form>

score 2 · Accepted Answer

我做的最简单的方法是：

$("#element").keydown(function(event) {
    if (event.keyCode == 13) {
        localiza_cep(this.value);
    }
});

score 2 · Accepted Answer

我刚刚为 jQuery 制作了一个插件，它允许更简单的keypress事件。您不必找到号码并将其输入，您所要做的就是：

如何使用它

包括我在下面的代码
运行此代码：

$(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 
    }
});

就是这么简单。请注意，这不是theKeyYouWantToFireAPressEventFor一个数字，而是一个字符串（例如，按下时触发，按下时触发，或者在数字的情况下，只是，没有引号。按下时会触发。）"a"A"ctrl"CTRL (control)11

示例/代码：

function getPressedKey(e){var a,s=e.keyCode||e.which,c=65,r=66,o=67,l=68,t=69,f=70,n=71,d=72,i=73,p=74,u=75,h=76,m=77,w=78,k=79,g=80,b=81,v=82,q=83,y=84,j=85,x=86,z=87,C=88,K=89,P=90,A=32,B=17,D=8,E=13,F=16,G=18,H=19,I=20,J=27,L=33,M=34,N=35,O=36,Q=37,R=38,S=40,T=45,U=46,V=91,W=92,X=93,Y=48,Z=49,$=50,_=51,ea=52,aa=53,sa=54,ca=55,ra=56,oa=57,la=96,ta=97,fa=98,na=99,da=100,ia=101,pa=102,ua=103,ha=104,ma=105,wa=106,ka=107,ga=109,ba=110,va=111,qa=112,ya=113,ja=114,xa=115,za=116,Ca=117,Ka=118,Pa=119,Aa=120,Ba=121,Da=122,Ea=123,Fa=114,Ga=145,Ha=186,Ia=187,Ja=188,La=189,Ma=190,Na=191,Oa=192,Qa=219,Ra=220,Sa=221,Ta=222;return s==Fa&&(a="numlock"),s==Ga&&(a="scrolllock"),s==Ha&&(a="semicolon"),s==Ia&&(a="equals"),s==Ja&&(a="comma"),s==La&&(a="dash"),s==Ma&&(a="period"),s==Na&&(a="slash"),s==Oa&&(a="grave"),s==Qa&&(a="openbracket"),s==Ra&&(a="backslash"),s==Sa&&(a="closebracket"),s==Ta&&(a="singlequote"),s==B&&(a="ctrl"),s==D&&(a="backspace"),s==E&&(a="enter"),s==F&&(a="shift"),s==G&&(a="alt"),s==H&&(a="pause"),s==I&&(a="caps"),s==J&&(a="esc"),s==L&&(a="pageup"),s==M&&(a="padedown"),s==N&&(a="end"),s==O&&(a="home"),s==Q&&(a="leftarrow"),s==R&&(a="uparrow"),s==S&&(a="downarrow"),s==T&&(a="insert"),s==U&&(a="delete"),s==V&&(a="winleft"),s==W&&(a="winright"),s==X&&(a="select"),s==Z&&(a=1),s==$&&(a=2),s==_&&(a=3),s==ea&&(a=4),s==aa&&(a=5),s==sa&&(a=6),s==ca&&(a=7),s==ra&&(a=8),s==oa&&(a=9),s==Y&&(a=0),s==ta&&(a=1),s==fa&&(a=2),s==na&&(a=3),s==da&&(a=4),s==ia&&(a=5),s==pa&&(a=6),s==ua&&(a=7),s==ha&&(a=8),s==ma&&(a=9),s==la&&(a=0),s==wa&&(a="times"),s==ka&&(a="add"),s==ga&&(a="minus"),s==ba&&(a="decimal"),s==va&&(a="devide"),s==qa&&(a="f1"),s==ya&&(a="f2"),s==ja&&(a="f3"),s==xa&&(a="f4"),s==za&&(a="f5"),s==Ca&&(a="f6"),s==Ka&&(a="f7"),s==Pa&&(a="f8"),s==Aa&&(a="f9"),s==Ba&&(a="f10"),s==Da&&(a="f11"),s==Ea&&(a="f12"),s==c&&(a="a"),s==r&&(a="b"),s==o&&(a="c"),s==l&&(a="d"),s==t&&(a="e"),s==f&&(a="f"),s==n&&(a="g"),s==d&&(a="h"),s==i&&(a="i"),s==p&&(a="j"),s==u&&(a="k"),s==h&&(a="l"),s==m&&(a="m"),s==w&&(a="n"),s==k&&(a="o"),s==g&&(a="p"),s==b&&(a="q"),s==v&&(a="r"),s==q&&(a="s"),s==y&&(a="t"),s==j&&(a="u"),s==x&&(a="v"),s==z&&(a="w"),s==C&&(a="x"),s==K&&(a="y"),s==P&&(a="z"),s==A&&(a="space"),a}

$(document).keydown(function(e) {
  $("#key").text(getPressedKey(e));
  console.log(getPressedKey(e));
  if (getPressedKey(e)=="space") {
    e.preventDefault();
  }
  if (getPressedKey(e)=="backspace") {
    e.preventDefault();
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>The Pressed Key: <span id=key></span></p>

因为长版太……好吧……太长了，我为它做了一个 PasteBin 链接：http:
//pastebin.com/VUaDevz1

score 2 · Accepted Answer

和已event.keyCode弃用event.which。请参阅上面的@Gibolt 答案或查看文档：https ://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent

event.key应改为使用

keypress事件也被弃用： https ://developer.mozilla.org/en-US/docs/Web/API/Document/keypress_event

score -9 · Accepted Answer

试试这个：

jQuery('#myInput').keypress(function(e) {
    code = e.keyCode ? e.keyCode : e.which;
    if(code.toString() == 13) {
        alert('You pressed enter!');
    }
});

javascript - jQuery Event Keypress：按下了哪个键？

24 回答 24

使用event.key和现代的 JS！

如何使用它

示例/代码：

Related

Reference

使用`event.key`和现代的 JS！