限制搜索范围jQuery

Question

如何将范围限制为每个组，以便销售价值反映该组的数量？

jQuery的：

var sales = (function calculateSales(){
    $( "h1 small" ).each(function() {
        var group = $(this).parent('.group');
        var numItems = group.find('.btn').length;
        var sold = group.find('.btn.hidden').length;
        $(this).text(sold+" of "+numItems+" sold");
    });
    return calculateSales; 
}());

HTML：

<div class="group">
    <h1>Title <small>Value</small></h1>
    <div>
        <a href="#" class="btn"></a>
    </div>
    <div>
        <a href="#" class="btn hidden"></a>
    </div>
</div>

<div class="group">
    <h1>Title <small>Value</small></h1>
    <div>
        <a href="#" class="btn"></a>
    </div>
    <div>
        <a href="#" class="btn hidden"></a>
    </div>
</div>

Answer 1

var group = $(this).parent('.group');应为var group = $(this).closest('.group');

.parent()方法仅搜索搜索集的父节点（在这种情况下为small），因此它只会查看不满足给定选择器的h1因此它不会退货。

由于您要查看祖先树，请使用.closest()

---

var sales = (function calculateSales() {
  $("h1 small").each(function() {
    var group = $(this).closest('.group');
    var numItems = group.find('.btn').length;
    var sold = group.find('.btn.hidden').length;
    $(this).text(sold + " of " + numItems + " sold");
  });
  return calculateSales;
}());

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

<div class="group">
  <h1>Title <small>Value</small></h1>
  <div>
    <a href="#" class="btn"></a>
  </div>
  <div>
    <a href="#" class="btn hidden"></a>
  </div>
</div>

<div class="group">
  <h1>Title <small>Value</small></h1>
  <div>
    <a href="#" class="btn"></a>
  </div>
  <div>
    <a href="#" class="btn hidden"></a>
  </div>
</div>