用破折号和括号分割数字（输入类型仅带数字）

Question

如何设置我的输入类型用括号和破折号分隔数字？

Number : <input type="text" name="quantity" id="quantity" />
          &nbsp;<span id="errmsg"></span>



$("#quantity").keypress(function (e) {
if (e.which != 8 && e.which != 0 && (e.which < 48 || e.which > 57)) {
    //display error message
    $("#errmsg").html("Digits Only").show().fadeOut("slow");
           return false;
}
 });

example input type

Answer 1

快乐编码：）

// Used to format phone number and add placeholder and max-length
function phoneFormatter() {
 $(' input[type="text"]').attr({ placeholder : '(___) ___-____' });
  $('input[tabindex="111"]').on('input', function() {
    var number = $(this).val().replace(/[^\d]/g, '')
    if (number.length == 7) {
      number = number.replace(/(\d{3})(\d{4})/, "$1-$2");
    } else if (number.length == 10) {
      number = number.replace(/(\d{3})(\d{3})(\d{4})/, "($1) $2-$3");
     
    }
    $(this).val(number)
    $('input[type="text"]').attr({ maxLength : 10 });
    
  });
};

$(phoneFormatter);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" name="input_111[]" value="" tabindex="111">