CODEWITHSUNDEEP
javascriptjquerykeypress
bl0b
bl0b

Reputation: 936

Get key value of a key pressed

I don't find how to get the value of a key pressed. I currently have 

$('#info_price').bind('keydown',function(evt){
    alert(evt.keyCode);

but it return '49' when I press on 1 instead of returning '1'.

Edit: I'm aware that Ascii code of key '1'.

The final goal is to allow people to only write digit into the input. So i want to detect the non digit and not display them.

Upvotes: 9

Views: 93238

Answers (8)

Kirill Reznikov
Kirill Reznikov

Reputation: 2357

Chrome and Opera today have Read only property data in event object.

It is written on MDN that currently this feature is "Working Draft".

https://developer.mozilla.org/en-US/docs/Web/API/InputEvent/data

Upvotes: 0

tarasikarius
tarasikarius

Reputation: 533

For those who google it now, like I am

$('input').on('keydown', function(e) {
  console.log(e.key);
});​

Upvotes: 24

Salketer
Salketer

Reputation: 15711

Here is a fully done code for you to work with (not mine, but I used it):

http://www.selfcontained.us/2009/09/16/getting-keycode-values-in-javascript/

keycode = {

    getKeyCode : function(e) {
        var keycode = null;
        if(window.event) {
            keycode = window.event.keyCode;
        }else if(e) {
            keycode = e.which;
        }
        return keycode;
    },

    getKeyCodeValue : function(keyCode, shiftKey) {
        shiftKey = shiftKey || false;
        var value = null;
        if(shiftKey === true) {
            value = this.modifiedByShift[keyCode];
        }else {
            value = this.keyCodeMap[keyCode];
        }
        return value;
    },

    getValueByEvent : function(e) {
        return this.getKeyCodeValue(this.getKeyCode(e), e.shiftKey);
    },

    keyCodeMap : {
        8:"backspace", 9:"tab", 13:"return", 16:"shift", 17:"ctrl", 18:"alt", 19:"pausebreak", 20:"capslock", 27:"escape", 32:" ", 33:"pageup",
        34:"pagedown", 35:"end", 36:"home", 37:"left", 38:"up", 39:"right", 40:"down", 43:"+", 44:"printscreen", 45:"insert", 46:"delete",
        48:"0", 49:"1", 50:"2", 51:"3", 52:"4", 53:"5", 54:"6", 55:"7", 56:"8", 57:"9", 59:";",
        61:"=", 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",
        96:"0", 97:"1", 98:"2", 99:"3", 100:"4", 101:"5", 102:"6", 103:"7", 104:"8", 105:"9",
        106: "*", 107:"+", 109:"-", 110:".", 111: "/",
        112:"f1", 113:"f2", 114:"f3", 115:"f4", 116:"f5", 117:"f6", 118:"f7", 119:"f8", 120:"f9", 121:"f10", 122:"f11", 123:"f12",
        144:"numlock", 145:"scrolllock", 186:";", 187:"=", 188:",", 189:"-", 190:".", 191:"/", 192:"`", 219:"[", 220:"\\", 221:"]", 222:"'"
    },

    modifiedByShift : {
        192:"~", 48:")", 49:"!", 50:"@", 51:"#", 52:"$", 53:"%", 54:"^", 55:"&", 56:"*", 57:"(", 109:"_", 61:"+",
        219:"{", 221:"}", 220:"|", 59:":", 222:"\"", 188:"<", 189:">", 191:"?",
        96:"insert", 97:"end", 98:"down", 99:"pagedown", 100:"left", 102:"right", 103:"home", 104:"up", 105:"pageup"
    }

};

Upvotes: 6

Barlas Apaydin
Barlas Apaydin

Reputation: 7315

You can detect all key values like this:

Here is working jsFiddle example.

$('textarea').keydown(function(e) {
    var order = e.which;
    console.log(order);
});​

Source.

Upvotes: 1

Vishal Suthar
Vishal Suthar

Reputation: 17193

To get the character of the ASCII:

String.fromCharCode();

to turn ASCII into a string.

Upvotes: 0

Neil
Neil

Reputation: 55392

The key code does not directly map to the character value. Instead, you need to look at the keypress event, which provides you with a charCode property. You can then use String.fromCharCode to turn that into a string.

Upvotes: 1

Leri
Leri

Reputation: 12535

As it's told in comment it's ASCII code. To get it as character you can do:

alert(String.fromCharCode(evt.keyCode));

Upvotes: 22

Aravindhan
Aravindhan

Reputation: 3626

In javascript each key has associated with a ASCII code as follows

                          1-49
                          2-50

like this http://www.cambiaresearch.com/articles/15/javascript-char-codes-key-codes

So you need to map this values according to the keypress event.

Upvotes: 3

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