问css选择器，以排除jquery对象的某些后代及其后代？

EN

$('#button1').click(function() {
  var selector = '#test ' + $('#input1').val();
  var numberElements = $(selector).length;
  $('#numberElements').text(numberElements);
  var elementsAsCommaSeparatedList = _.pluck($(selector), 'id');
  $('#elementList').text(elementsAsCommaSeparatedList.join(', '));
});

#input1 {
  width: 230px;
  font-size: 16px;
  font-weight: bold;
}

#numberElements,
#elementList {
  color: green;
  font-weight: bold;
  font-size: 20px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<label for="input1">Please supply a selector... $('<input id="input1" value="div:not(.foo, .foo *)"></label>')
<button id="button1">Apply Selector</button>
<div>(default value is from @DaniP's answer)</div>
<div id="result"><span>Number of elements selected:  </span><span id="numberElements">0</span></div>
<div>
  <span>Elements selected (by id):</span>
  <span id="elementList"></span>
</div>
<div id="test">
  <div id="div1">
    <div id="div2">
      <div id="div4">
        <div id="div8"></div>
        <div id="div9"></div>
      </div>
      <div id="div5" class="foo">
        <div id="div10"></div>
        <div id="div11"></div>
      </div>
    </div>
    <div id="div3">
      <div id="div6">
        <div id="div12"></div>
        <div id="div13"></div>
      </div>
      <div id="div7" class="foo">
        <div id="div14"></div>
        <div id="div15"></div>
      </div>
    </div>
  </div>
</div>