Keydown event issue on HTML textbox

Question

I have a field that accepts the year, so I have created

input type=\"number\" 

and implemented keydown event to restrict

Answer 1

HTML:

jQuery:

$(document).on('input', '.year', function(){
    var txt = $(this).val();
    if(isNaN(txt) || txt > 9999){
        $(this).val( $(this).data('temp') );
        return;
    }
    $(this).data('temp', txt);
});

JSFiddle