Ограничение на ввод символов в текстовом поле

only_digits.js

$("input[type='number']").on('keyup keypress blur change', function(e) {
        //return false if not 0-9
        if (e.which != 8 && e.which != 0 && (e.which < 48 || e.which > 57)) {
            return false;
        }else{
            //limit length but allow backspace so that you can still delete the numbers.
            if( $(this).val().length >= parseInt($(this).attr('maxlength')) && (e.which != 8 && e.which != 0)){
                return false;
            }
        }
    });