键盘输入与条形码输入

Question

I have a textbox that shows only numbers

    <input type="number" min="0" max="999999999999999999" maxlength="1">

and I have a barcode scanner

now

the thins is that when I type on my keyboard I can only type 1 character and it will show 1 character on the textbox but I am having trouble in the barcode scanner because when I scan on the scanner it only shows 1 character on the text box and I need the whole barcode

can someone please help me on the codes

*note: there should only be one textbox

Answer 1

you've set the maxlength of the input to maxlength="1" - which means that this input can't have more than 1 character - not matter if the source is keyboard or barcode scanner (barcode scanner eventually emulates keyboard input). you need to remove that.

EDIT

as a work around please check this out... what I've done here is measure the time a key stroke takes. measure the time of a keyboard and compare is to the time it take the barcode scanner. if I'm correct then the barcode scanner should be much lower then the keyboard:

<input type="text" onkeydown="checkKeyDown(this)" onkeyup="checkKeyUp(this)" />
<script>
    var keyDownTime;

    function checkKeyDown(obj) {
        keyDownTime = new Date();
    };

    function checkKeyUp(obj) {
        var now = new Date();
        alert(now - keyDownTime);
    };
</script>