Get key value of pressed key

Question

I do not know how to get the value of the pressed key. I currently have

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

but it returns “49” when I press 1 instead of returning “1”.

Edit: I know that the Ascii code of the key is "1".

The ultimate goal is to allow people to write numbers only for input. Therefore, I want to detect not a number and not display them.

Answer 1

As he said in the comment, ASCII code. To get him as a character, you can do:

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

Answer 2

For those who do it now, for example, I

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

Answer 3

In javascript, each key is associated with 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 match these values ​​according to the keypress event.

Answer 4

Here is the complete code to work (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" } }; 

Answer 5

You can find all key values, such as:

Here is a jsFiddle example.

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

A source

Answer 6

key code does not directly display the character value. Instead, you need to look at the keypress event, which will provide you with the charCode property. Then you can use String.fromCharCode to turn this into a string.

Answer 7

To get the ASCII :

 String.fromCharCode(); 

to turn ASCII into a string.

Answer 8

Chrome and Opera today have a read-only property in the event object.

On MDN it is written that at present this function is the "Working Version".

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