Auto filling parentheses and hyphen for phone number input jquery

Question

I want to have a user's input auto fill the punctuation of a phone number to look like this (xxx) xxx-xxxx. I have written an example jfiddle here but it breaks when filling in the last 4 digits of the phone number.

$("#phone").on("change keyup paste", function () {
    var output;
    var input = $("#phone").val();
    input = input.replace(/[^0-9]/g, '');
    var area = input.substr(0, 3);
    var pre = input.substr(3, 4);
    var tel = input.substr(6, 4);
    if (area.length < 3) {
        output = "(" + area;
    } else if (area.length == 3 && pre.length < 3) {
        output = "(" + area + ")" + " " + pre;
    } else if (area.length == 3 && pre.length == 3) {
        output = "(" + area + ")" + " " + pre + "-" + tel;
    }
    $("#phone").val(output);
});

HTMl:
<input id='phone'></input>

Answer 1

I realize this post is older but i found it quite useful and made some minor modifications to enhance it for all telephone fields and to allow for deleting characters if the user makes a mistake.

$("input[type='tel']").each(function(){
  $(this).on("change keyup paste", function (e) {
    var output,
      $this = $(this),
      input = $this.val();

    if(e.keyCode != 8) {
      input = input.replace(/[^0-9]/g, '');
      var area = input.substr(0, 3);
      var pre = input.substr(3, 3);
      var tel = input.substr(6, 4);
      if (area.length < 3) {
        output = "(" + area;
      } else if (area.length == 3 && pre.length < 3) {
        output = "(" + area + ")" + " " + pre;
      } else if (area.length == 3 && pre.length == 3) {
        output = "(" + area + ")" + " " + pre + "-" + tel;
      }
      $this.val(output);
    }
  });
});

<input type="tel" placeholder="(XXX) XXX-XXXX" />