Clever Geek Handbook

Keydown Event Codes

In the KeyDown event of the textbox, I can check the keyCode range

For example,

if (e.keyCode == 90 to 97 || e.keyCode == 104 to 110)

How to write it down correctly?

+2


source to share


4 answers 


var inInterval = function (code, min, max) {
    return code >= min && code <= max;
};

if (inInterval(e.keyCode, 90, 97) || inInterval(e.keyCode, 104, 110))

Or, slightly better:



var interval = function (min, max) {
    return {
        min: min,
        max: max,
        contains : function (elem) {
            return this.min <= elem && elem <= this.max;
        }
    };
};

interval(90, 98).contains(92); // true
interval(90, 98).contains(15); // false
+6


source 


if ((e.keyCode > 89 && e.keyCode < 98) || (e.keyCode > 103 && e.keyCode < 111))

or



if ((e.keyCode >= 90 && e.keyCode <= 97) || (e.keyCode >= 104 && e.keyCode <= 110))
+1


source 


if ((90 <= e.keyCode && e.keyCode <= 97) || (104 <= e.keyCode && e.keyCode <= 110))
0


source 


var myKeycodes = [1,2,3,4,5,6];
if(myKeycodes.indexOf(e.keyCode) != -1){
    // your keycode is in the array, do stuff
}
0


source






More articles:


All Articles